Answer:
There are no options in this question but generally a sample of DNA can be increased;
By using Polymerase Chain Reaction (PCR) technique.
Explanation:
This question describes the application of making molecular biology to solving a crime problem; a branch called forensics. In this case where an insufficient small amount of DNA sample was recovered from the blood in a crime scene, the polymerase chain reaction technique, commonly known as PCR can be used to increase the DNA sample.
In the 1980's, a molecular technique used to amplify part of a template DNA strand to produce several copies of it, was invented by Kary Mullis and his colleagues. This amplification refers to the numerical increase in the number of DNA sequence.
Some tools have various levels of graduations. For example, a ruler may have graduations for both millimeters and centimeters. When measuring the length of an earthworm, which graduations would allow for the most accurate measurement?
Answer:
I would say Millimeters
Explanation:
Millimeters are smaller than Centimeters and can measure the length of an earthworm most accurately.
Hope this helps.
Millimeters would allow for the most accurate measurement.
What is Measurement?Measurement is defined as the quantification of characteristics of an object or phenomenon which can be used to compare them with other objects or phenomena. It is a process of determining how large or small a physical quantity is compared to a basic reference quantity of the same type.
It helps us to compare unknown quantities with known quantities. This helps us make quantitative statements about how big, how long, how fast things are. Without measurements, the final product would be full of errors.
Example:- Speedometer is used to measure the speed of vehicles.
A ruler marked in millimeters is more unique than a ruler best marked in centimeters, a millimeter being a smaller unit than a centimeter.
Thus, Millimeters would allow for the most accurate measurement.
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What is a pH in biology?
Answer:
pH is the measure of hydrogen ion concentration in a solution. It measures how acidic or how basic a solution is, on a scale of 0 to 14, where less than 7 is acidic, 7 is neutral, and greater than 7 is basic.
Answer:
A quantitative measure of an acid or basicity of aqueous or other liquid solutions. also stands for power of hydrogen
In 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.
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.
What type of data is recorded by the electrocardiograph?
Answer:
Electrical signals from your heart to check for conditions and illnesses that can be detected by this data.
Abdul put cress seeds on wet filter paper in dishes. He put 20 seeds in each dish. Every day he added 5 cm3 of water to each dish. He kept each dish at a different temperature. How many different temperatures did Abdul use?
Answer:
8 different temperatures
Explanation:
The annexed chart is required to answer this question and should have been provided.
From this chart, we can see that Abdul kept different dishes at 17, 18, 19, 20, 21, 22, 23 and 24 °C, and that at 22°C he experienced the highest number of germinated seeds.
Therefore, Abdul used 8 different temperatures.
which of the following describes research that would be considered basic science
Answer:
B. A professor is studying fish
What would happen if sex cells underwent mitosis instead of meiosis
Answer:
If gametes (sperm and egg) were made by mitosis, then they would be diploid. ... A tetraploid zygote is not viable and will most likely miscarriage.
Explanation:
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.
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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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 :(
What is the function of insulin?
Insulin is a hormone produced in the pancreas (gut) .
Function:
Insulin regulates the amount of glucose in the blood. The lack of insulin causes a form of diabetes.
Explanation:
Insulin is a hormone secreted by the beta- cells of Islets of Langerhans of pancreas.
Its function is to regulate blood sugar level in the body by decreasing it. If the sugar level of the blood increases, it is detected by the pancreatic cells and it releases insulin.
Hope it helps.
If you have any query, feel free to ask.
What are the factors that determine the level of harm an introduced chemical has on the environment? (Site 1)
Answer:
Following are the factors are given below:-
Explanation:
In general, the toxicity of a substance depends on the following factors.
Chemical type and inherent behavior. Dosage, in particular the link dose-time. Exposure route. Species. Stage in life, such as child, young adult, or an older adult. Gender. Fitness to drink. Metabolism. Allocation inside the organ. Excretion Human safety, including organ function and childbirth, requiring physical effects that can affect toxicity. Nutritional status Many chemicals are available. Circadian rhythms (the time of day caused by a medication or other substance)The major factors that determine the level of harm an introduced chemical have on the environment -
type of chemical concentration weather conditionssolubility in waterThe environment of the ecosystem and the health of organisms are affected by the use and the accumulation of persistent pollutants. The following are the factors that help in determining the level of harm of an introduced chemical:
type of chemical - types of chemicals determine the level of toxicity of a particular chemical.concentration - concentration of chemical dependency on the harm of the chemical.weather conditions - the chemical effect on weather also affects the level of harm.solubility in water - chemicals solubility in water affects harm on the organisms.Thus, The major factors that determine the level of harm an introduced chemical have on the environment -
type of chemical concentration weather conditionssolubility in waterLearn more:
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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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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 form. The negative charges of one water molecule is attracted to the positive in another, causing them to flock together. This property is known as _____________. Adhesion Repulsion Cohesion Revulsion
Answer:
Cohesion
Explanation:
The negative and positive sides of water molecules are attracted to each other and cause water to be attracted together and stick together.
This is called cohesion, when molecules of the same type stick together.
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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Based on the information in the graph, what conclusions can be drawn about the rate of skin cancer in men
compared to that in women?
than in women
Answer:
The correct answer is - Skin cancer increased at a faster rate in men than in women.
Explanation:
Skin malignant growth is the most well-known disease in the entirety of mankind. Although white and albino skinned person individuals have a more possibility of building up this malignancy, consistent exposure to the sun with no skin security has caused an expansion in instances of skin disease regardless to the person's skin shading.
In spite of being a typical disease in ladies, skin malignancy has been developing exponentially among men as of late. This is primarily on the grounds that ladies will in general take more consideration of their skin and ensure it more regularly than men.
Thus, the correct answer is - Skin cancer increased at a faster rate in men than in women.
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 :)
Set up 1: Add a spoon of yeast+cold water leave for 10 minutes and observe the foam formation Set up 2: Add a spoon of sugar and a spoon of yeast add room temperature water leave for 10 minutes and observe the foam formation Set up 3: Add a spoon of sugar and a spoon of yeast add ice cold water and close the mouth with a plastic paper leave for 10 minutes and observe the foam formation. Measure the height of the foam formed in all the three set up. Under your finding. Give reason for your observation
Answer:
The foam was found higher where the water temperatures were higher, then continued the height of the foam where the water was cold and lastly the ice water.
Explanation:
Yeasts undergo alcoholic fermentation, and perform a chemical reaction consisting of the following conditions:
That there is a substrate, that is, some reagent that the yeast can metabolize to give ethanol as a product, in this case it is sugar.
That there is a relatively anaerobic medium, that is why it is closed with film.
That the sea temperature approximately 30 degrees Celsius so that the fermentation is favored.
The bubbling that we see is nothing more than the chemical reaction that the yeast fungus produces when metabolizing the carbohydrate, which in this case is type A sugar, to give ethanol as a product. This chemical reaction releases gaseous components as fermentation occurs, that is, the more bubbling, the faster the reaction and the better the fermentation.
In the situation where the water was freezing and the foam or bubbling was lower regardless of whether it was closed by a plastic, because the extremely low temperature in the water slowed down the reaction rate of alcoholic fermentation.
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.
When did people begin to notice that coastlines if continents fit together like a puzzle
a. when satellite begin taking pictures of earth from space
b. when Alfred Wegener propose the idea of continental drift
c. when early explorers traveled from Europe and Asia to the Americas
d. when geologists first started examining the fossil record of South America
Answer:
B. When Alfred Wegener propose the idea of continental drift
Explanation:
The first true explanation came from Alfred Wegener, who proposed the Plate Tectonic Theory. This theory stated, in a nutshell, that the continents different pieces that collided together at faults.
Technically, explorers found out this way back. If you consider this the answer choice, then C is your best answer.
Answer:
its c
your welcome
What happens when someone's brain has a low level of neurotransmitters?
A. Motor neurons aren't able to send messages to muscles,
O B. Action potentials can't form in the sensory neurons.
O C. The nervous system can't create hormones,
O D. Neurons aren't able to communicate with each other.
Answer:
Neurons aren't able to communicate with each other.
Answer: D
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:
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.
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 .
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.
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Describe how mutations lead to genetic variations. Which appears to be more dangerous: the BRC1 or BRC2 mutation? Analyze a woman’s risk of dying of cancer if she carries a mutated BRC1 gene. How do heredity and inheritance relate to the data presented in these charts? What data would you need to see in order to draw conclusions about the effectiveness of preventive surgeries? What does the age at diagnosis tell you about the mutation? Explain how breast-cancer genes are still present in the population, despite cancer-related surgeries and deaths.
Answer:
an EKG technician does not see any duration fro. baseline on the monitor what type of Line is the technician observing
What is a reaction center?
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.