Answer:
B. It is done by humans to select certain traits useful to us.
Explanation:
There are two main types of selection: natural and artificial. Natural selection is all of the other answers, it is seen over generations and allows the fittest to survive. It also occurs with no human intervention. However, artificial selection is done by humans. It occurs when humans breed animals to best fit their needs. This is best seen in dog breeding.
A mutation occurred in the following DNA sequence AGCCTAGCC and the mutated form is now AGCCTTAGCC. Which of the following correctly describes the result of this mutation?
1.A deletion occurred so all of the amino acids added after the mutation may be wrong.
2.An insertion occurred so all of the amino acids added after the mutation may be wrong.
3.A substitution occurred so all of the amino acids added after the mutation will definitely be wrong.
4.An insertion occurred so all of the amino acids added after the mutation definitely will be different.
Answer:
Explanation:
1.A deletion mutation occurs when a wrinkle forms on the DNA template strand and subsequently causes a nucleotide to be omitted from the replicated strand.
2.This type of variant results in a shortened protein that may function improperly, be nonfunctional, or get broken down. An insertion changes the DNA sequence by adding one or more nucleotides to the gene.
3. A substitution mutation can cause the following: Change in the coding of amino acids codon to a particular stop codon resulting in an incomplete protein, which is usually non-functional. Can cause Silent mutations where a codon change can encode the same amino acid resulting in no changes in the protein synthesized.
4. when a premature nonsense or stop codon is introduced in the DNA sequence. When the mutated sequence is translated into a protein, the resulting protein is incomplete and shorter than normal. Consequently, most nonsense mutations result in nonfunctional proteins.
What is the end product of glycolysis ?
Answer:
pyruvate
Explanation:
Explanation:
The final product of glycolysis is pyruvate in aerobic settings and lactate in anaerobic conditions. Pyruvate enters the Krebs cycle for further energy production.
Why is the alpine tundra biome worth protecting WELL GIVE BRAINLIEST IF YOU CAN HLO ME
Struggled with this earlier but because of the high altitude only some animals can live there and thrive because of the lower oxygen levels
The Channel Islands are a series of small islands off the California coast. Each island has a genetically distinct population of foxes. Compare the population of foxes on one of these islands to the population of foxes in the forests of mainland California. Which is more likely to be impacted by genetic drift? Which is more likely to be at Hardy-Weinberg equilibrium?
Answer:
The fox population on the Islands experiences genetic drift whereas foxes in the forests has Hardy-Weinberg equilibrium.
Explanation:
The fox population on the Islands experiences genetic drift because there is no chance of introduction of different type of foxes in these Islands which experiences less variation in the population of already existing foxes. Genetic drift is the change that occur in the frequency of an existing gene allele in a population due to random sampling of organisms. Genetic drift may cause gene variants to disappear completely with the passage of time which leads to reduce genetic variation. The foxes that is located in the mainland forest experiences Hardy-Weinberg equilibrium.
) An allosteric interaction between a ligand and a protein is one in which: (3 pts) A) binding of a molecule to a binding site affects binding of additional molecules to the same site. B) binding of a molecule to a binding site affects binding properties of another site on the protein. C) binding of the ligand to the protein is covalent. D) multiple molecules of the same ligand can bind to the same binding site. E) two different ligands can bind to the same binding site.
Answer:
B) binding of a molecule to a binding site affects the binding properties of another site on the protein.
Explanation:
In an allosteric interaction between a protein and a ligand, the ligand binds to a site in the protein. As a result, there is a change in the properties of other active sites on the protein. These active-site changes may or may not allow the protein to bind to other molecules. There is a change in the protein that affects the affinity of the active site for other molecules. The affinity on the active site increases if the protein binds to an activator and decreases if the protein binds to an inhibitor molecule.
Name three kinds of prokaryotic cells
Answer:
Euryarchaeota
Crenarchaeota
Nanoarchaeota
Answer:
lactobacillus acidophilus.
Cyanobacteria.
Archaea.
Find some applications of
nanotechnology in medical care and disease prevention.
Answer:
Preventing illnesses, more quickly diagnose, control diseases, treat diseases with fewer side effects, and create better medical aids such as more compatible prosthetics.
why us a spirogyra called a thallus ? which types of nutrition does it show ?why?
Explanation:
a plant body that is not differentiated into stem and leaves and lacks true roots and a vascular system. hence spirogyra called a thallus.
Spirogyra is an example of Green algae , thus it prepare its own food by process of photosynthesis in presence of sunlight and chlorophyll.So, its nutrition type is Autorophic.
differentiate between kidneys and lungs
Kidneys are used to excrete urine and toxic wastes. They are very essential for keeping the body clean. Usually it excretes urea, sodium and some salts which are considered as waste in the body.
Lungs are used to breathe in and out air. It helps us to stay alive. We breathe in oxygen rich air and breathe out foul carbon dioxide air.
what's the cell wall of a onion made up of?
Answer:
Unlike animal cells (such as cheek cells) the cell wall of an onion and other plants are made up of cellulose, which protects the cell and maintains its shape.
Answer:
cell membrane,cytoplasm,nucleus and a large Vacuole.
Explanation:
An onion is a multicellular(consisting of many cells)plant organism.As in all plant cells,the cell of an onion peel consists of a cell wall.
Which is more complex and less complex organism biosphere cell ecosystem
Answer:
The highest level of organization for living things is the biosphere; it encompasses all other levels. The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
Hope you give 5 stars
What type of mutation is caused when a codon that corresponds to one of the twenty
amino acids specified by the genetic code is changed to a chain-terminating codon?
A nonsense mutation
B silent mutation
C chromosomal mutation
D missense mutation
how does a cow drink water
Answer:
cow will line up side by side and drink
Explanation:
They have to dip their mouth in without suck- ing air at the sides of their lips.ep 3
PLSSS HELLLPP- Which of the following measurements uses a derived unit? O volume O mass O length O time
Answer:
Volume
Explanation:
volume=length ×length ×length
The metric system is the system used for the measurement. It measures the mass, length, weight, time, etc. The unit of volume is a derived unit. Thus, option A is correct.
What is a derived unit?A derived unit is a unit used to measure and estimate the substance by using the basic or the fundamental metric unit system. It is based on units of the fundamental system.
The fundamental units include mass, temperature, time, luminous intensity, length, electric current, and amount of substance. On the other hand, derived units result from a combination of base units.
A volume is a derived unit as it came from the fundamental unit of length as,
Volume = length × length × length
= cm × cm × cm
= cm³
Therefore, option A. volume is a derived unit.
Learn more about derived unit here:
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define and describe osmosis
Answer:
Movement of a solvent (such as water) into a solution with a higher solvent concentration by means of a semi-permeable membrane (as from a live cell), which tends to equal solute concentrations in the membrane on both sides.
Explanation:
Osmosis, the spontaneous transition, distribution, or diffusion of water and other solvents over a semipermeable membrane. In 1877, a German physiologist, Wilhelm Pfeffer, researched the process, which is important in biology.
Osmosis is the passage of water down its concentration gradient, across a semi-permeable membrane. An everyday example is a plastic wrap in your kitchen: it allows air and water vapor to move across it, but no water or food. The membranes of cells are semi-permeable, too.
scientists who believe global warming is happening would agree with which of the following statements?
(A) There are few, if any, misconceptions about global warming
(B) Most scientists agree that global warming is occuring
(C) Human activity is a minor cause of global warming.
(D) There is little humans can do to stop global warming
Answer:
B. Most scientists agree that global warming is occurring.
Explanation:
There is a large deal of misconception in the public surrounding global warming. Human activity is the primary cause of global warming, and therefore, there are many actions that humans could take to stop global warming.
is a hair tie a good example for the cytoplasm since a hair tie holds your hair together as the cytoplasm does to the rest of the organelles?
Answer:
I don't see why not, I mean, based on what I remember about my biology, I think that's a great example. :)
Question 6 of 25
Which is an example of a vestigial structure?
A. Raccoon tail
B. Fish gills
C. Whale pelvis bone
D. Human arm
help:,)
the answer for your question is D
what does Cystic fibrosis do?
(please write in your own words)
Is there any plastid in mango seed?
Use the drop-down menus to complete the hypothesis of the first group of researchers. During a drought, the decrease in rainfall will reduce the amount of vegetation that can grow and increase the occurrence of natural fires, so an elevation in Select… and a reduction in Select… should be found in the cores.
Answer:
Microscopic charcoal, Vegetation.
Explanation:
As the researchers conducting research in the Nile region identified that an increase in temperatures leads to an increase in droughts and reduction of natural vegetation and thereby the chances of the occurrence of natural fires.Why are fungi more like animals than plants?
PLEASE HELP ME
Answer:
Hey mate.....
Explanation:
This is ur answer.....
However, unlike plants, fungi do not contain the green pigment chlorophyll and therefore are incapable of photosynthesis. That is, they cannot generate their own food carbohydrates by using energy from light. This makes them more like animals in terms of their food habits.
Hope it helps!
Brainliest pls!
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6.Explain how animals in Vertebrata are classified into further subgroups.
Answer:
Vertebrates are further classified according to several criteria like exoskeleton, respiratory organs, method of giving birth, number of chambers in heart, mode of living etc. They are further classified into classes Pisces, Amphibia, Reptilia, Aves and Mammals
In 1970, Frye and Edidin published research describing the mobility of plasma membrane proteins. They fused mouse and human cells together, creating a hybrid cell, and then examined the localization of mouse and human proteins over time. Initially mouse and human proteins were each restricted to one-half of the heterokaryon, but over time the mouse and human proteins mixed, with each being present over the entire cell surface. What technique did Frye and Edidin likely use to examine the mouse and human proteins
Answer:
The answer is "fluorescent microscopy".
Explanation:
A microscope featuring fluorescence is just the same as a conventional light microscope with additional features. Conventional microscopy employs visible light (400-700 nanometers) to illuminate and generate an enlarged image data. Scientists use this highly sensitive, precise, dependable, extensively to see the location of chemicals in tissues and macrophages in organs.
When cells are damaged, they release proteins called ____ ?
inflammatory chemical signals that evoke local vasodilation
Help needed in biology…!
Answers:
viii) ATP
ix) To extract its chlorophyll
x) Amino Acids
xi) Aquatic submerged plants
xii) Rapid blood flow at high pressure
Hope this helps!
[I learned this in Bio this year so I know the answers]
Which of the following is most efficient for mapping large areas of the ocean or the whole ocean floor? A. satellite imaging B. infrared imaging C. radio waves D. sonar
Answer
the answer is d. sonar
Name the following.
(a) Tissue that forms the inner lining of our mouth.
(b) Tissue that connects muscle to bone in humans.
(c) Tissue that transports food in plants.
(d) Tissue that stores fat in our body.
(e) Connective tissue with a fluid matrix.
(f) Tissue present in the brain
HELP!!!!!!!!!! Which of the following statements regarding membrane transport is false? I will mark brainliest!!!!!!!
Answer:
It is the 3rd one I believe
Whats a hypothesis for “Which bait works better for a homemade fly trap?”
Answer:
If I use the correct bait, then I will have a successful homemade fly trap.
Explanation:
A hypothesis is always an "if, then" statement
