Answer:
1/2
Explanation:
A genetic counselor meets with a man and a woman that both are carriers of sickle cell anemia.
The sickle cell anaemia genotype is ss where for producing normal haemoglobin, we have SS or Ss (Carrier).
When both man and woman are carriers, we have
S. s
S. SS. Ss
s. Ss. ss
Thus, the probability that the couple would have a child that was also a carrier for sickle cell anemia is 2/4= 1/2.
Answer:
50%
Explanation:
the below shows the distribution of marks obtained by a group of students in a mathematics test............... The marks are : 5,6,7,8,9,10. And the number of students are : 4,8,10,7,13,3..... Calculate the mean,median, mode,range.
Answer:
Hey there!
We have:
4 students with 5 marks.
8 students with 6 marks.
10 students with 7 marks.
7 students with 8 marks.
13 students with 9 marks.
3 students with 10 marks.
Thus, the mean is: [tex]\frac{4(5)+8(6)+10(7)+7(8)+13(9)+3(10)}{4+8+10+7+13+3}[/tex], or around 7.58 marks.
The median is the middle number and since we have 45 people, the middle number would be the 23rd. 4+8+10+1=23, Thus, 8 marks i s the median.
The mode is the most common score, which is 9.
The range is the range of all the values, which is from 5-10. Thus, giving us a range of 10-5, or 5.
Hope this helps :)
While you and your classmate are studying for your biological anthropology midterm, your classmate tells you that the bones of Lucy, a famous australopithecine specimen that dates to about 3.2 million years ago, were dated based on carbon-14 analysis. Why is this incorrect?
The options for this incomplete question are :
Fossils are living organisms that have wholly or partially been transformed into rock.
Lucy does not have bones with organic material necessary for carbon-14 dating.
This specimen is also far too old for C-14 dating to be accurate, as well as for any other technique but palaeomagnetic dating.
Your classmate is therefore incorrect for all of the reasons listed. (All of the above)
Answer:
The correct answer is - all of the above reasons.
Explanation:
Fossils are living life forms that have completely or mostly been changed into the rock during the process of fossilization. Lucy doesn't have bones with organic material that are essential to use the carbon 14 dating technique.
This example is additionally very old for C-14 dating to be exact, just as for some other method, however, palaeomagnetic dating can do the job of dating in this case.
Thus, the correct answer is - all of the above reasons.
If a forest experiences a fire, which adaptation would most likely help an organism survive?
Answer:
cellulose
Explanation:
Children living at high altitudes develop larger chest cavities by adulthood than children living at lower altitudes. This is an example of Group of answer choices environmental adaptations that occur at the individual level. acclimatization at the individual level. developmental adaptations that occur at the level of the individual during critical life stages. inheritance of increases in lung volume by high-altitude populations.
Answer:
developmental adaptations that occur at the level of the individual during critical life stages.
Explanation:
High altitudes is characterized by low amounts or concentration of oxygen. The body parts especially the lungs have to adjust and the lungs are usually expanded to allow for more oxygen for the body metabolism.
This is why Children living at high altitudes develop larger chest cavities by adulthood than children living at lower altitudes and is an example of developmental adaptations that occur at the level of the individual during critical life stages.
An experienced nurse who has just done a cervical exam on your patient calls you to Labor and Delivery. She reports that she believes the vertex is not presenting. You perform a vaginal examination and confirm the presenting part is not the vertex. In considering malpresentations, which of the following portions of the fetus that is foremost, or presenting, in the birth canal is not compatible with a vaginal delivery?
a. Compound
b. Shoulder
c. Brow
d. Face mentum anterior
Answer:
The correct answer is - B. shoulder
Explanation:
The position of a fetus is facing towards the back of the mother in normal condition with the face and body angled to one side and the neck flexed, and the standard presentation is headfirst.
An abnormal position is facing forward instead of rearward, and abnormal presentations include four parts that are face, brow, breech, and shoulder.
In this particular case, all three presentations are compatible with vaginal delivery in the birth canal except the shoulder as it is not compatible according to the malpresentation described in the question.
Thus, the correct answer is - B. shoulder
0cm3 of acid were mixed with 60cm3 of alkali in an insulated container. The average temperature of the two solutions before they were mixed was 19.5°C. The temperature after mixing was 27.5°C. Was this an exothermic or an endothermic reaction?
Answer: Endothermic reaction.
Explanation: An endothermic reaction is any chemical reaction that absorbs heat from its environment. In this reaction, the temperature of the mixture raised from 19.5°C to 27.5°C, which means there was an increase of heat, ergo, it is an endothermic reaction.
Which land feature supports the theory of continental drift?
canyons
volcanoes
coal fields
Oceans
Help plz
Answer:
The correct option is;
Canyons
Explanation:
The theory of continental drift, which was a 1596 hypothesis of Abraham Ortelius, is that the continents on Earth have had relative motion with one another over a period of geologic time such that the continents looks to haven drifting motion over the bed of the ocean
Evidence of the motion of the continents was first presented by Alfred Wegener in 1912 and continuing exploration of the ocean floor by Harry Hammond Hess has revealed that the there are lots of canyons, sea mountains such that the crust of the Earth moved apart on the facing sides of the ocean ridge which where evidence of sea floor spreading supporting the theory of continental drift.
THE ANSWER IS COAL FIELDS NEARLY EVERYONE POSTING THIS PUT CANYONS AND IS NOT RIGHT. I just took the quiz and put coal fields and got it right. No gimmicks. This the true answer.
what are the materials needed for respiration to occur
Answer:
Glucose + oxygen → Carbon Dioxide + Water
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂0
Explanation:
Glucose and oxygen and the reactants required for respiration to occur and as a result of respiration carbon dioxide and water are both formed as products.
What kinds of illnesses could be effectively treated with a bone marrow
transplant?
A. Illnesses where the body has trouble controlling the nervous
system
B. illnesses involving vision problems
C. illnesses where the body has trouble making new blood cells
D. Illnesses where the body has trouble making new hormones
Answer:
The answer is C.
Explanation:
Bone Marrow is responsible for making new blood cells.
Illnesses, where the body has trouble making new blood cells, can be effectively treated with a bone marrow transplant.
What is bone marrow?The spongy sections of bones contain bone marrow, which is a semi-solid and soft tissue that fills the medullary cavities, or the cores of bones.
What is its function?It forms stem cells that lead to the formation of new blood cells.
What are some diseases where the body has trouble making new blood cells and is treated with a bone marrow transplant?Leukemias, severe aplastic anemia, lymphomas, etc. are some diseases that are treated with a bone marrow transplant.
To learn more about blood cells, bone marrow, and bone marrow transplants here,
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why the process of photosynthesis is important to life on Earth?
Answer:
Photosynthesis captures light energy from the Sun and stores it in the bonds of glucose, which is then used during cellular respiration to drive the formation of ATP in all plants and animals.
hope this can help you .
how did autotroph and heterotroph lead to a two kingdom classification system
Answer:Autotrophs are organisms that can produce their own food from the substances available in their surroundings using light (photosynthesis) or chemical energy (chemosynthesis). Heterotrophs cannot synthesize their own food and rely on other organisms — both plants and animals — for nutrition. Technically, the definition is that autotrophs obtain carbon from inorganic sources like carbon
Explanation:
If you burn wood in a fireplace, which type of energy resource are you using?
Answer:
Potential energy
Explanation:
Batteries, biomass, petroleum, natural gas, and coal are examples of chemical energy. Chemical energy is converted to thermal energy when people burn wood in a fireplace or burn gasoline in a car's engine.
Answer: Potential energy
Explanation:
In a species of chickens, incomplete dominance between alleles for black (B) and white(w) feathers
is observed. Heterozygotes are blue.
• If two blue chickens are crossed, what is the probability that the offspring will be blue.
Answer:
1/2
Explanation:
This question involves a single gene coding for feather color in chickens. The black allele (B) is incompletely dominant over the white allele (W). This means that the allele B will not mask the phenotypic expression of allele W, hence, a third intermediate blue phenotype (BW) will be produced.
According to the question, if two blue chickens are crossed i.e. BW × BW, the gametes B and W will be produced by each parent. Using these gametes in a punnet square (see attached image), the following offsprings will be produced:
BB, BW and WW in the ratio 1:2:1
BB is black, BW is blue, WW is white. Hence, the probability of producing a blue chicken from this cross is 1/2.
State the characteristic of tracheoles that help with gaseous exchange
in insects.
Answer:
made up of a single epithelium layer to allow diffusion of gases.terminal ends of fine tracheoles are filled with a fluid in which gases dissolve and therefore transported in solution formIn response to high amounts of phosphate transport into the cell: a. PhoR is phosphorylated by the phosphate transporter protein Pst b. PhoR binds with PhoB to remove PhoB repression of phosphate regulon genes c. PhoR is exported out of the cell to scavenge phosphate molecules d. PhoU changes conformation to allow PhoR to autophosphorylate e. PhoU keeps PhoR bound to the phosphate transporter protein Pst
Answer:
e. PhoU keeps PhoR bound to the phosphate transporter protein Pst
Explanation:
PhoU is a membrane protein known to regulate the transport of phosphate (Pi) between cellular compartments. It has been discovered that mutations in this protein cause lethality because the cell becomes incapable of controlling the intracellular levels of Pi, this being toxic for the cell. PhoR is a histidine kinase/phosphatase. When the Pi level is considered to be a limiting factor, PhoR autophosphorylates at a histidine residue and then donates its phosphoryl group to PhoB. On the other hand, when the Pi level is high, this protein removes the phosphoryl group from phospho-PhoB. Finally, the Pst is a signal transduction protein that acts as a transporter capable of switching its conformation during the transport of PI.
Which method is most likely used to identify what happened before the start of the Paleozoic era? Scientists study fossils from the Jurassic period. Scientists observe index fossil records of the Mesozoic era. Scientists examine fossil evidence during the Precambrian time. Scientists explore the emergence of mammals and humans in the Cenozoic era.
Scientists examining the fossil evidence during the Precambrian time is used to identify what happened before the start of the Paleozoic era.
What is Precambrian time?This is defined as the period of time which extends from about 4.6 billion years ago.
Due to the wide difference in time present, its fossil is used to identify what happened before the start of the Paleozoic era which is why option C was chosen.
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Scientists examine fossil evidence during the Precambrian time, is used to know observation before the start of the Paleozoic era, hence option C is correct.
What is fossil evidence during the Precambrian time?Prior to 541 million years ago, the Precambrian was known as the "Age of Early Life." The oceans of the planet were home to soft-bodied animals like worms and jellyfish.
The land remained uncultivated. Microorganisms, primitive creatures, and stromatolites, mats of algae, are typical Precambrian fossils.
They may be able to determine what occurred before the Paleozoic era by doing research on events during the Precambrian period.
Therefore, scientists examine fossil evidence during the Precambrian time, hence option C is correct.
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Which of the following statements is true? Stem cells can only be obtained by destroying embryos. Stem cells can be obtained from the brain and other tissues in healthy adults. Stem cells are unobtainable because they can't be kept alive in lab conditions. Stem cells can be produced artificially.
Answer:
Stem cells can be obtained from the brain and other tissues in healthy adults.
Explanation:
Now research is showing that these stem cells can actually be obtained throughout the brain or other body tissues.
Stem cells can be obtained from the brain and other tissues of healthy adults by a mechanism of induced pluripotent stem cell (IPSC). The second statement is the correct one.
What is a stem cell?
Stem cells are present in the body and can form either a single type of cell or multiple kinds of cells. The zygote is an example of a stem cell because it divides to form various types of cells such as the heart cell, lung cell, nerve cell, and so on. This is called a totipotent stem cell, which can form all types of cells.
As the embryo grows, the totipotent nature of cells is lost, and they become pluripotent. Pluripotent stem cells can differentiate to form a wide range of organs such as the lungs, heart, etc.
These cells are further specified as being multipotent stem cells. These stem cells can only form a particular range of cells, such as hematopoietic stem cells. This stem cell can only form blood cells.
A mature cell from the body can be taken and chemically induced to be a pluripotent stem cell (IPSC). Stem cells can't completely form in a lab as they require a lot of signalling molecules.
Hence, stem cells can be obtained from the brain and other tissues of a healthy adult.
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Which is the first step that geologists must do to compare rock layers at distant locations? 1.find the absolute age of rocks at both locations 2.compare a layer at one location to layers at other locations 3.identify index fossils in one or more layers at one location 4.collect fossils from different locations to study the organisms’ lifestyles
Answer:
2.compare a layer at one location to layers at other locations
Explanation:
Comparing rock layers in distant places can be a challenge for geologists since these layers may have different environmental factors that caused different transformations in them.
Therefore, when it is necessary to establish a comparison between layers of rocks in different ligands, geologists must establish steps to make an efficient comparison and have results consistent with reality. To do this, they must first compare a layer in one location with layers in other locations, assign relative age to a layer in one location, and identify index fossils in one or more layers in one location.
To compare rock layers at distant locations is geologist should ; Identify index fossils in one or more layers at one location ( 3 )
When geologists study rock layers at different locations they try to determine the ages of the rocks by studying the different layers from different locations. this task could be very challenging. therefore to make their study easy the first step geologists should take is to Identify index fossils in one or more layers at one location
Comparing layers at different locations can be use to estimate the relative ages of the rocks closer to reality but it a very daunting task.
Hence we can conclude that the first step that geologists must take to compare rock layers at distant locations is Identifying index fossils in one or more layers at one location
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The chemical equation of photosynthesis includes 602. Which best describes this substance?
a solid used during photosynthesis.
a gas used during photosynthesis.
a liquid produced during photosynthesis.
a gas produced during photosynthesis.
Answer:
The correct option is;
A gas produced during photosynthesis
Explanation:
The chemical reaction of photosynthesis is given as follows;
6CO₂(g) + 6H₂O(l) + Energy from light → C₆H₁₂O₆(s) + 6O₂(g)
Therefore, six molecules of gaseous carbon dioxide (CO₂) combine withe six molecules of liquid water (H₂O) in the presence of energy from Sunlight to produce one molecule of solid glucose (C₆H₁₂O₆) and six molecules of gaseous oxygen (O₂)
The 6O₂ is the gaseous oxygen produced as a byproduct of photosynthesis
Answer:
D
Explanation:
Together, the stages of cellular respiration break down one molecule of ___ to generate a total of ____ molecules of ATP. The remaining energy is released as __ .
Answer:
1) Glucose
2) 36
3) Heat
Explanation:
Cellular respiration is a metabolic process that every living organism undergo. It is the process by which energy is obtained by living cells. In the process of celluar respiration, energy-storing food molecule called Glucose is broken down in the presence of oxygen in order to release its energy and convert it to a usable form by the cell called ATP.
Celluar respiration occurs in three distinct stages in eukaryotes viz: Glycolysis Kreb's cycle and Oxidative phosphorylation. In Glycolysis, which occurs in the cytoplasm, glucose is broken down in a series of enzymatic reaction to yield Pyruvate and releasing a net gain of 2 ATP molecules. In Kreb's cycle, which occurs in the mitochondrion, produces carbondioxide in a two-cycled reaction involving Pyruvate. 2 ATPs are also produced in this stage.
Lastly, in Oxidative phosphorylation also occuring in the mitochondrion, electrons are passed through electron acceptors to create a pump that generates the synthesis of 32 ATP molecules. In general, the three stages yield a total of 36ATP molecules from one molecule of GLUCOSE.
The rest of the energy from the oxidation of glucose is lost as heat energy, which is responsible for the warming effect we feel.
Is it transphobic not to date a transgender woman or man ?
Answer:
being transphobic could be not wanting to date a trans man or woman, but it is mostly just a strong disliking of being trans. A transphobic would mostly likely be against everything a trans woman or man is. basically they just do not like a trans person for who they are or want to be on the inside :(
helloo guysss pleaseeee help with this one
Answer
Uses of yeast
Fermentation BiomassGlycerol Alcoholic beverageYeast is found on the outer surface of sugary substances like fruits and grains.
Hope it helps :)
Answer:
i'm not in my biology class yet
Explanation:
i trust this thou Uses of yeast
Fermentation
Biomass
Glycerol
Alcoholic beverage
Yeast is found on the outer surface of sugary substances like fruits and grains.
Hope it helps :)
How does the use of hybridized seeds lead to increased food production in India?
Answer:
hybridization can be used to produce plants giving a high yield by breeding an indigenous variety of the plant having disease and pest resistant qualities and also a greater adaptability to the particular environment with a high yielding exotic variety to get an offspring having the desired qualities of both and also promoting hybrid
this should help
What is the best conclusion? The rate of cellular respiration in germinating peas is exactly one thousand times the rate of ATP production. Germinating peas at 10ºC create carbon dioxide at a rate of 0.01 mL/min during ATP production. Germinating peas at 20ºC have a higher rate of cellular respiration than germinating peas at 10ºC. The rate of cellular respiration cannot be measured without knowing the rate of ATP production.
The given question is incomplete, the complete question is:
During germination, peas sprout and grow. The data table shows the carbon dioxide produced during the germination period of peas under different conditions. Condition Rate of carbon dioxide produced (mL/min) Germinating peas, 10ºC 0.01 Germinating peas, 20ºC 0.02 What is the best conclusion? The rate of cellular respiration in germinating peas is exactly one thousand times the rate of ATP production. Germinating peas at 10ºC create carbon dioxide at a rate of 0.01 mL/min during ATP production. Germinating peas at 20ºC have a higher rate of cellular respiration than germinating peas at 10ºC. The rate of cellular respiration cannot be measured without knowing the rate of ATP production.
Answer:
The correct statement is that at 20 degree C, the germinating peas exhibits a higher rate of cellular respiration in comparison to the germinating peas at 10 degree C.
Explanation:
The process of respiration results in the production of carbon dioxide, respiration refers to a chemical reaction that generates water, carbon dioxide, and energy by undergoing oxidation of the glucose molecules. This phenomenon plays an essential role in the life of the organisms for obtaining energy from the food they consume to perform daily activities.
From the question, it is evident that the peas, which were germinating at 20 degrees C exhibit a higher rate of cellular respiration as they are generating 0.02 milliliters of carbon dioxide in a minute, while on the other hand, the germinating peas at 10 degrees C are giving rise to 0.01 milliliters of carbon dioxide in a minute.
Answer:
Germinating peas at 20ºC have a higher rate of cellular respiration than germinating peas at 10ºC.
Explanation:
Although they are different species, woodpeckers and squirrels both live in holes in trees. What resource are these species competing for?
Answer:
space and shelter
Explanation:
Answer:
space or shelter is the answer,i got it right
Explanation:
Amphibian species worldwide have been in decline. A significant proportion of the decline seems to be due to the spread of the chytrid fungus, Batrachochytrium dendrobatidis (Bd). Chytrid sporangia reside within the epidermal cells of infected animals, animals that consequently show areas of sloughed skin and are lethargic. The infection cycle takes four to five days, at the end of which zoospores are released from sporangia into the environment. In some amphibian species, mortality rates approach 100%. Apart from direct amphibian-to-amphibian contact, what is the most likely means by which the zoospores spread from one free-living amphibian to another?
Answer:
Water
Explanation:
The most likely means is water by which the zoospores spread from one living amphibian to another because amphibians lives in water and these zoospores can move in water and reach another amphibian causing infection to them. Amphibians are the organisms which lives both land and water. They requires water for reproduction so they lives at wet places. Zoospores have a unique structure which able them to swim in the water. So water is a great source of dispersal of zoospores from amphibian to amphibian.
The pathogenesis of tuberculosis includes the entrance of mycobacteria into the lungs and the resulting of which of the following? (Select all that apply.) Calcification Ghon tubercles Formation of granulomas Activation of macrophages Antigen-antibody complexes
Answer:
The macrophages have a in the calcification process, which generates the inflammatory processes. The Ghon tubercles is a lung lesion caused in tuberculosis that consists of a focus of calcification in conjunction with a lymph node infection. A granuloma is a mass of immune cells that forms when the immune system tries to isolate foreign substances.Macrophages can be activated by a variety of stimuli during the immune response. The antigen-antibody (Ag-Ac) reaction is one of the molecular reactions in the body's immune response.Explanation:
Tuberculosis is a disease caused by Mycobacterium tuberculosis, a bacterium that almost always affects the lungs. When the active form of the disease is present, symptoms (cough, fever, night sweats, weight loss, etc.) can be mild for many months. If not treated properly, Tuberculosis can be fatal.
Macrophages are a type of white blood cell found in the blood and they are the first body's defense against foreign substances. So they are effector cells of the immune system, the main players in the innate immune response.
When M. Tuberculosis infects a person, it attacks this first-response immune cells in the lungs, the macrophages. When they recognize these pathogens, macrophages produce the cytokines IL-1 and TNF-α, which cause the inflammation itself by acting on the endothelial cells of the nearby blood vessels to allow the transendothelial migration of the leukocytes. The inflammation t is a non-specific response to environmental aggressions, and its purpose is the isolation and destruction of the damaging agent, as well as repairing the damaged tissue or organ.
The macrophages have a in the calcification process, which generates the inflammatory processes. The Ghon tubercles is a lung lesion caused in tuberculosis that consists of a focus of calcification in conjunction with a lymph node infection. These lesions are especially common in children and may retain viable bacteria, so they are sources of disease transmission and may also be associated with classic tuberculosis reactivation after several years of inactivity.A granuloma is a roughly spherical mass of immune cells that forms when the immune system tries to isolate foreign substances that it has been unable to eliminate. Therefore it is a special type of inflammation that can occur in a wide variety of diseases. Infections that are characterized by granulomas include tuberculosis, but also include for example leprosy, histoplasmosis, cryptococcosis, coccidioidomycosis, blastomycosis, and cat scratch disease.Macrophages are usually in a resting state, they can be activated by a variety of stimuli during the immune response. Antigen phagocytosis serves as an initial stimulus; however, macrophages and their activity can be increased by cytokines secreted by, or through contact with, helper T-lymphocytes. One of the most powerful macrophage activators is gamma interferon. They are also able to recognize molecular patterns associated with pathogens. M. tuberculosis is a pathogen that contains Pathogen-associated molecular patterns (PAMPS), which are small sequences of molecules that repeat in groups of pathogens. They are recognised by Pattern-recognition receptors (PRRs), which include the Toll-like receptor (TLRs) family or the NOD-like receptors (NLRs). Once the receptors found in the macrophages recognize these PAMPS, the macrophages are activated are ready to perform an immune response.The antigen-antibody (Ag-Ac) reaction is one of the molecular reactions in the body's immune response. The concept refers to the specific binding of an antibody to an antigen to inhibit or delay its toxicity. When the macrophage recognizes a pathogen, it phagocytes it and degrades it, and presents its peptides to a T cell. This can activate a cytotoxic response, causing apoptosis of infected cells. Or, the T cell may activate a B cell to produce antibodies. Antibodies are proteins whose function is to detect any foreign elements that may enter the body. They normally detect specific parts of these elements, for example, proteins from the surface of bacteria or viruses. When antibodies bind to these foreign proteins, they act as a marker, making it easier for them to be recognised and eliminated by the cells of the immune system.If we divide a drop into smaller and smaller parts, what will be the smallest particle that can be obtained and that will continue to be water?
If it hits a single atom, a "product" can be broken. But only until it is a single molecule will a "molecule" be separated. Of starters, oxygen, H2O, always appears like oxygen in millions. But if you split it into smaller and lesser parts, say half, you can divide it only until you get 2 hydrogen and 1 oxygen. It's no longer water if you divide it further. It's going to be another matter.
Hope this helps!
What was one of the first rocks ever formed? Is it still popular today?
Answer:
One of first rock ever formed is faux-amphibolites.
Explanation:
Faux amphibolites were discovered by researches and it believed to be formed as a result of volcanic activities. It is also believed to be prevalent between igneous and metamorphic rock locations as a result of volcanic deposits.
This type of rock however isn’t popular today due to decreased volcanic activities and eruptions.
When considering the arrangement of rods and cones in the retina, there is a central location where only cones are found. As we move farther away from this point there are increasing amounts of rods and fewer cones so, as some point we are only able to see black and white. This central location of only cones is known as the
Answer:
Fovea centralis
Explanation:
The fovea centralis is also a part of the structures found in the eyes.
The fovea centralis is characteristics as a small, central pit made up of closely packed cones and no rods in the eye.
It is found in the center of the macula lutea of the retina. It is the location that has the highest visual acuity and best color vision.