Answer:
The answer is option 2.
Explanation:
Mutation occurs when there is a change in DNA base sequences.
(Correct me if I am wrong)
Answer:
Mutations occur randomly through changes in DNA.
Explanation:
It's now understood that mutations occur randomly and aren't directed in response to an immediate change in the environment.
Research suggests that mitochondria and chloroplasts are modern-day descendants of ancient prokaryotes that were engulfed by ancestral eukaryotes. DNA is present in both of these organelles, which represents the only location for DNA in a eukaryotic cell outside of the nucleus. Briefly explain how this DNA evidence strongly supports this theory of endosymbiosis.
Answer:
Explanation:
Mitochondria and Chloroplast contain some Ribosomes which are different from the cytoplasmic ribosomes,These were measured to be 80s,while the Mitochondria and Chloroplasts are 70s.
Furthermore smaller circular DNA were found in theses two organelles,(which are the first DNA outside nucleus).These DNA types are the exact forms found in bacteria.
Thus, it was concluded that if these organelles could contained these genetic materials,they must be bacterial.Therefore chloroplast and mitochondria were ancient bacterial which now live in a mutual exclusive relationships in the larger cells of Eukaryotas(plant and animals).This is the basis of Endosymbiont theory.
That is these organelles live inside(Endo) new host in symbiosis or beneficial association with one another (symbiont).
Justin is a 24-month-old male with multiple food allergies, including milk, eggs, and peanuts. At six months old a cooking utensil that had been used to cook eggs touched his arm and his mother noticed a significant dermatological response. As a result, Justin’s pediatrician advised her to avoid eggs, cow’s milk, and peanuts in Justin’s diet until food allergy testing could be done at two years of age. Fortunately, Justin hasn’t had any negative reactions to soy milk. Food allergy testing has confirmed that Justin needs to continue to avoid cow’s milk and peanuts. His pediatrician plans to conduct food allergy testing annually and advises his mother that Justin will likely be able to outgrow the milk allergy. Justin is referred to a registered dietitian for an assessment of his growth and nutrition intake. His mother reports that he is able to feed himself and she has noticed no problems with chewing and swallowing. A 24-hour dietary recall shows Justin consumed the following foods:
Fortified soy milk (4 ounces), rice cereal, bananas, grilled soy-cheese sandwich, fortified soy milk (4 ounces), green beans, apricots, orange juice (8 ounces), apple slices, almond butter on toast, apple juice (8 ounces), roast turkey, baked potato, green peas, and fortified soy milk (4 ounces).
Date Weight Weight for age % Height Height for age % Weight for length %
12 months 23# a.____ 29" d.____ g.____
18 months 26# b.____ 31.5" e.____ h.____
24 months 29# c.____ 33.5" f.___ i.____
1) Complete the above table. Is Justin’s growth on track?
2) Does the diagnosis affect his nutritional needs? If so, how ?
Answer:
The correct answer is -
1. Based on height he is 50% and height he is 25%
2. The nutritional needs are normal due to the constant percentage in both height and weight throughout.
Explanation:
By the reference of the chart of growth rate presented by CDC,
These informations can be found-
Weight :
A= 50%
B=50%
C=50-75%
Height :
D=10-25%
E=25%
F=25%
Then the percentage of height by weight ratio
Height by weight%:
G=75-90%
H=75-90%
I=75-90%
Thus, the correct answer is -
1. Based on height he is 50% and height he is 25%
2. The nutritional needs are normal due to the constant percentage in both height and weight throughout.
The Coriolis effect contributes to ________.
a. an increase in eutrophication
b. increased acidic deposition
c. a reduction in eutrophication
d. global warming
e. global wind patterns
1. Escherichia coli is one of the most common causes of foodborne illness, yet it is also a common microorganism found within the human gut. What explains this disparity
Answer:
E. coli is commonly found in the large intestine of humans and other warm-blooded animals (2). These strains can be commensal, existing in a symbiotic state providing resistance against pathogenic organisms, or be pathogenic and cause diseases of intestinal and extra-intestinal sites
Explanation:
brainliest plzzzzzzzzz
How is the endosymbiosis theory used to support the emergence of eukaryota
Answer:
The endosymbiotic theory states that some of the organelles in eukaryotic cells were once prokaryotic microbes. Mitochondria and chloroplasts are the same size as prokaryotic cells and divide by binary fission. Mitochondria and chloroplasts have their own DNA which is circular, not linear.
Answer:
tho mpal u moan nice not lock yt?
If any of these shark species were to go extinct, what would most likely be a result to their ecosystems?
Select one:
a. Nothing, sharks are only human killers.
b. The ecosystem would collapse because sharks are vital to their ecosystems.
c. The habitat would develop new species. With the sharks gone, new organisms can move in to fill that niche.
d. The ecosystem would get healthier. Sharks spend the majority of their time hunting and searching for humans to kill in there habitat
Answer:B
Explanation:
They are vital to there ecosystem
Students today, leaders tomorrow speech
Answer:
The young blood should understand the value of time. It is very precious and never waste it in bad things. Young blood should do everything to complete their dreams and also serve to their country.
Explanation:
The young generation is the future of any country. There role is much important than others. They are the essential and integral part of the society and we can not imagine a country or a society without a young blood. So it is rightly said that todays generation or young blood will be the future of a country. They are the driving force and make government to make the their decision at prior. Young blood is the future of a society or community can change the country. Thus they should live in hope and to participate in building the future of the country. They should be honest, good and hard worker and should contribute to their country service. Young blood is the backbone of a country that can change the value of a country. Physical education and sports can teach a lot to them.
Polysaccharides are polymers of monosaccharides. Homopolysaccarides are made up of only one type of monomer, whereas heteropolysaccharides are composed of at least two different kinds of monomers.
Are starch, glycogen, cellulose, and chitin classified as homopolymers or heteropolymers?
A. All four polysaccharides are homopolymers.
B. All four polysaccharides are heteropolymers.
C. Starch is a heteropolymer, whereas chitin, cellulose, and glycogen are homopolymers.
D. Chitin is a heteropolymer, whereas starch, cellulose, and glycogen are homopolymers.
Answer:
Option A
Explanation:
All four types of polysaccharides are homopolymers ie they are made up of repeating units of only one type of monomers.
Starch, glycogen and cellulose are made up of repeating monomeric units of glucose with the number of glucose units and the different linkage types different these molecules. E.g the linkage between glucose units in glycogen is alpha 1-4 linkages and in cellulose, we have glucose in beta 1-4 linkages.
In chitin, a derivative of glucose is present in repeating units, here, we have N-acetyl-D-glucosamine in beta 1-4 linkages.
Albumin is a protein found in blood that helps to regulate amount of fluids in the body. What is the main function of albumin?
to provide structure
to fight disease
to maintain homeostasis
to regulate cell reactions
Answer: c.) to maintain homeostasis
Explanation: you're welcome!! cx
Answer:
C
Explanation:
Edge2020 quiz
In the process of cellular respiration, glucose is broken down into simpler compounds. Respiration is carried on in the presence (aerobic) or absence (anaerobic) of free oxygen.
a. True
b. False
Answer:
a. True
Explanation:
Cellular Respiration is the process by which cells of all living organisms obtain the required energy for their metabolic activities. Respiration is a catabolic process whereby glucose is broken down to release Its high energy and used to synthesize a usable form of energy by the cell (ATP).
Cellular respiration occurs in living cells with oxygen (aerobic) or without oxygen (anaerobic). In aerobic respiration, three processes viz: Glycolysis, Kreb's cycle and Oxidative phosphorylation are involved. Oxygen is the final electron acceptor in the Electron transport chain of the Oxidative phosphorylation.
On the other hand, anaerobic respiration is employed by certain bacteria in the absence of oxygen. In anaerobic respiration, another final electron acceptor is used other than oxygen.
Both processes yield Adenosine triphosphate (ATP).
In most mammals, the embryo obtains food substances from the mother via the
O Yolk
O Amnion
O Placenta
Uterus
Explanation:
it is through the placenta.
it also protects the embryo from harmful substances
Compare and contrast the contributions of Neel, Pauling, and Ingram to our understanding of the genetic and molecular basis of sickle cell disease (SCD).
He demonstrated that SCD and sickle cell trait were due to the presence of abnormal 8-globin polypeptides in red blood cells. He demonstrated that the electrophhoretic mobility of B-globin from patients with SCD was different from that of healthy individuals. He demonstrated that both parents of multiple patients with SCD had low levels of sickled red blood cells. He hypothesized that SCD was a recessive trait and that the parents of patients with SCD would be heterozygous carriers. He demonstrated that the difference between B-globin polypeptides in individuals who were healthy and those with SCD is an amino acid substitution. He performed a peptide fingerprint analysis on B-globin from individuals with 84 84 and 89 88, which identified the segment of B-globin that was changed by the BS mutation. James Neel Linus Pauling Vernon Ingram
hope it helps..
Which reason best explains why bacteria are good at causing infections in other organisms? It would not be able to divide. Bacteria are transmitted easily and reproduce quickly. Bacteria evolve slowly as they pass on genetic information. Bacteria are easily killed by a host’s immune system or antibiotics.
Answer:
Bacteria are transmitted easily and reproduce quickly
Explanation:
Bacteria are organisms that have a single cell. The process of reproduction of the bacteria is binary fission. The parent cell divides into the daughter cell. The DNA of the parent cell gets copied and gets divided by forming the identical daughter cells. Some bacteria have nutritional values in them while the others are infectious. They can divide at an alarming rate if they receive favorable conditions. Also, they are easily communicable and transmittable. It is because of this reason that the bacteria are good at causing infections in other organisms.
DNA replication is considered semi-conservative because: ________ Group of answer choices it will create three new, identical strands when finished. it always replicates in the 3 to 5 prime direction. it uses the original strand as a template for replication. it never replicates in the 5 to 3 prime direction.
Answer:
I think it uses the original strand as a template for replication.
In imaginary fruit, white fruit color (W) is dominant over yellow fruit color (w) and disk-shaped fruit (D) is dominant over sphere-shaped fruit (d). If a plant true-breeding for white, disk-shaped fruit is crossed with a plant true-breeding for yellow, sphere-shaped fruit, what will the phenotypic ratios be for: Show all work
Answer:
See the answer below
Explanation:
Genotype of a true-breeding white, disk-shaped fruit = WWDD
Genotype of a true-breeding yellow, sphere-shaped fruit = wwdd
Crossing the two:
WWDD x wwdd
WwDd
All the offspring (100%) will have the genotype WwDd with white, disk-shaped phenotype.
Assuming the cross is advanced to F2:
WwDd x WwDd
W_D_ 9 White, disk-shaped (9/16)
W_dd 3 White, sphere-shaped (3/16)
wwD_ 3 Yellow, disk-shaped (3/16)
wwdd 1 Yellow, sphere-shaped (1/16)
(See the attached image for the Punnet's square)
Which statement best describes the relationship of photosynthesis and onorgy?
The process of photosynthesis is onergy storing bocause the process converts light onorgy into chemical energy,
which is stored in the bonds of glucoso,
The process of photosynthesis is onergy-releasing because the process convorts light onorgy into froo onorgy that
can be used for cell functions.
The process of photosynthesis is onergy conserving because no onergy is used throughout the process of forming
glucose and oxygen molecules,
The process of photosynthesis is onergy-wasting because photosynthesis is an inofficient process that doplotos
the cell of energy stored in the bonds of glucose.
The process of photosynthesis is onergy storing bocause the process converts light onorgy into chemical energy,
4. Which type of plate boundary does the image show?
O A. Fragmentation
OB. Transform
O C. Convergent
O D. Divergent
The type of plate boundary that an image is expressing is known as convergent. Thus, the correct option for this question is C.
What do you mean by Plate boundary?A plate boundary may be defined as a type of location where two specific plates meet. These boundaries are generally associated with numerous geological events like earthquakes.
According to the context of this question, plate boundaries govern the three-dimensional surface or zone across which there is a significant change in the velocity that may take place.
Convergent plate boundaries may be characterized as a type of plate boundary when two or more specific plates come together in such a way that they meet. At this boundary, two or more lithospheric plates collide. One plate eventually slides beneath the other.
Therefore, the type of plate boundary that an image is expressing is known as convergent. Thus, the correct option for this question is C.
To learn more about Plate boundaries, refer to the link:
https://brainly.com/question/838446
#SPJ5
The following models show one large cell (A) and four small cells (B).
O
O
olo
O
00
ОО,
O
A
B.
Which of the following states why one of the models is better for moving
more nutrients in and out of the cell?
O A. A is better because it has more surface area.
The question is incomplete and the diagram is also not given. So the diagram is attached below and the complete question is as follows:
The following models show one large cell (A) and four small cells (B).
Which of the following states why one of the models is better for moving more nutrients in and out of the cell?
A. B is better because it has more surface area.
B. A is better because it has less surface area.
C. A is better because it has more volume.
D. B is better because it has more volume
Answer:
A. B is better because it has more surface area.
Explanation:
The movement of nutrients in a cell depends on the surface to volume ratio. More is the surface to volume ratio, better will be the movement of nutrients in and out of the cell.
In the given model, small cells (B) has more surface to volume ratio as surface area of B is larger, so, the model B is better for moving more nutrients in and out of the cell.
Hence, the correct option is "A".
Answer:
B has smaller cells but more surface area than A
Explanation:
B
Briefly explain what was done in the experiment where pigeons could choose which button to peck in the Skinner box. How does this relate to self-control?
In this experiment, Skinner placed a pigeon inside a box that contained a button that when pressed released water or food. This pigeon went through periods of deprivation of water and food, but over time, he realized that when he pecked the button he had access to these two elements. Skinner called this behavior operant behavior, which is the behavior that occurs controlled by its consequences.
Although Skinner did not specifically study self-control, with this experiment, we can make a connection between operant behavior and self-control, since both are behaviors shown as a way to change the environment in which they are inserted, but this change also affects them.
(a).
Describe how you could safely
test for starch in potatoes
Answer:
In the presence of starch, iodine turns black.
Explanation:
It is possible to distinguish starch from glucose using iodine solution.
Hope it helps.
Okay.
Stay safe.
Thanks.
History has demonstrated that the techniques employed in this laboratory exercise often overestimate an individual's actual resting tidal volume. List some reasons why these laboratory techniques might produce abnormally high values for resting tidal volume.
Answer:
See below
Explanation:
One possible reason here could be the fact that since the person is being watched while doing this exercise, they might tend to breather deeper than they normally do. Secondly, it may also be because the person is trying to make up for the spit filter and flow meter by breathing harder/sharper than they normally would.
A particular cell has half as much DNA as some other cells in a mitotically active tissue. The cell in question is most likely in Group of answer choices
Answer:
This question is incomplete. Group of answer choices are:
A. G1
B. G2
C. Prophase
D. Metaphase
E. Anaphase
The correct answer is A.
Explanation:
The G1 phase (Gap 1 phase) is the period of the cell cycle from the time a cell is born until the S phase begins. When the G1 phase begins (just after the division of the stem cell) the size of the newly originated cell is half of its normal size, and the cell must grow to reach it. For this, in this period, RNA and proteins are actively synthesized. During this period, the cell has only the amount of DNA that it has received from its progenitor and each chromosome is made up of a single chromatid, since DNA replication has not yet occurred.
In the image below, what kind of molecules does the label A represent?
A.
Water molecules
B.
Nitrogen molecules
C.
Oxygen molecules
D.
Carbon dioxide molecules
Answer:
oxygen molecules
Explanation:
The arrows in the photo itself gives you the hint as you know in the picture they showed an arrow in which the tree is releasing something and we know that trees release oxygen gas which will be afterwards absorbed by the amimals and human beings.
Hope this helps and pls mark as brainliest :)
In the wild, various sperm and egg cells must navigate a complex environment to complete fertilization. There are mechanisms in place at the molecular level to guard against interspecies fertilization, even between very closely related species. Some of these mechanisms involve lock and key functions of interacting proteins. These molecules most likely regulate which type of reproductive isolation mechanism? Please explain.
Answer:
pre-zygotic reproductive isolation
Explanation:
The molecules regulate the pre-zygotic reproductive isolation mechanism.
Reproductive isolation generally refers to the variety of biological processes that sustain the formation of new species of biological organisms.
Some of these processes act to prevent fertilization or the formation of zygotes between organisms that are not of the same species (pre-zygotic mechanisms) while others ensure that the product of fertilization is invalid in case the former fails (post-zygotic mechanisms).
Some pre-zygotic mechanisms ensure that there exists no form of mating among organisms that are not of the same species due to incompatible reproductive organs, but where this fails, another pre-zygotic mechanism will act so that that the mating will not lead to fertilization and there will not be formation of zygotes.
The prevention of fertilization between organisms with compatible reproductive organs but of different species is carried out by molecules. These molecules ensure that there are locks and keys in place to prevent the fertilization of the egg by the sperm.
Which of the following actions involves voluntary muscle movement?
Answer:
what are the options?
Explanation:
Voluntary muscles require a lot more energy than involuntary muscles and remain relaxed when you're not moving, such as when you're asleep.
Which of the following answers correctly lists the four main types of macromolecules?
A.
DNA, RNA, triglycerides, water
B.
Monosaccharides, water, DNA, triglycerides
C.
Water, oxygen gas, ammonia, carbon
D.
Carbohydrates, lipids, proteins, nucleic acids
Answer:
D. carbohydrates, lipids, proteins, and nucleic acids[tex]hope \: it \: helps[/tex]
Answer:
D
Explanation:
They are the main types of macromolecules
Which statement best describes the relationship of photosynthesis and energy? 1. The process of photosynthesis is energy-storing because the process converts light energy into chemical energy, which is stored in the bonds of glucose. 2.The process of photosynthesis is energy-releasing because the process converts light energy into free energy that can be used for cell functions. 3.The process of photosynthesis is energy-conserving because no energy is used throughout the process of forming glucose and oxygen molecules. 4.The process of photosynthesis is energy-wasting because photosynthesis is an inefficient process that depletes the cell of energy stored in the bonds of glucose.
Answer:
3 is appropriate statement that describes photosynthesis
the correct answer for this question is 1. The process of photosynthesis is energy-storing because the process converts light energy into chemical energy, which is stored in the bonds of glucose.
A cline:
a. is continuous variation that follows a geographic continuum.
b. is variation that falls into discrete categories.
c. was used to describe human variation as early as the Renaissance.
d. describes the pattern of occurrence of trisomy 18.
Answer:
The correct answer is - option A is continuous variation that follows a geographic continuum.
Explanation:
A cline is a slow change in the physical and genetic traits of a population or species across a geographical difference or gradient. If a species present in a very large area, there would be some members live on different environmental condition in comparison to others.
By this gradient members of species show continuous variation that follows a geographic continuum. For, example, In a species of warm-blooded animals have large body size in cooler area than in warmer area.
Thus, the correct answer is - option A is continuous variation that follows a geographic continuum.
Identify the type of system used for mass production. Tommy owns a toy factory and uses a in which all the machines and workers at workstations process each manufactured item in the same order. This system is suitable for mass production.
The adaptive structure and function of leaves and stems helps the plant
A create its own energy
B prevent wilting
C produce haploid gametes
D produce diploid gametes
Answer:
I think, your answer is,. create it's own energy. By the process of photosynthesis, where stems and leaves do their major function.Explanation:
Hope it helps you........Answer:
A. Create it's own energy
Explanation:
Plants have adaptations that assist in the creation of energy such as: stems support and hold the leaves above the ground for more light, surface of leaves exposed to sunlight.