A virus is referred to as a particle rather than a cell because structurally it is a A) RNA core in a carbohydrate envelope. B) nucleus surrounded by a protein coat. C) plasmid of DNA surrounded by a capsid. D) RNA or DNA core surrounded by a protein coat.

Answers

Answer 1

Answer:

The correct option is D.

A virus refers to an infectious micro organism that is made up of nucleic acid molecule that is enclosed within a protein coat. Viruses are only able to reproduce and multiply when they come in contact with living cells, in the absence of living cells they remain dormant and they do not show any sign of been a living thing. The nuclei acid molecule of a virus can be in form of a DNA molecule or a RNA molecule.

Answer 2

Answer:

Answer: The answer is D/RNA or DNA core surrounded by a protein coat.

Explanation: One reason a virus is considered to be a particle rather than a cell is because structurally it is only a RNA or DNA core surrounded by a protein coat. It has none of the other features of bacterial cells.

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Describe how ecologists use the technique of sampling to estimate population size?

Answers

The sampling technique to estimate the population size involves the marking and release method as it is not possible for count a large population.

What is Sampling method of population estimation?

Population sampling is the process of taking a subset of subjects which is a representative of the entire population of a species. The sample size must have sufficient size of individual species to warrant the statistical analysis.

The sampling technique of population size estimation involves capturing a sample of animals and marking them in some way for instance, using the tags, bands, paint, or other kind of body markings. Then, the marked animals from the population are released back into the environment and are allowed to mix up with the rest of the population of the species. Later on, a new sample is collected from the same population of the species and through the repetition of this technique the total population size can be estimated.

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ecologists can't measure the whole population so instead they measure and area say a square mile and count how many of X there are. Then for this particular region they can easily estimate the amount of X's by multiplying the total number of square miles by the number of X's they found in that 1 square mile

In 1809, Lamarck developed one of the first theories of evolution called the

Answers

the inheritance of acquired characteristics

aquired traits. The ideas are flawed but he is one of the first to propose a mechanism explaining how organisms change over time.

Brown fat cells produce a protein called thermogenin in their mitochondrial inner membrane. Thermogenin is a channel for facilitated transport of protons across the membrane. What will occur in the brown fat cells when they produce thermogenin? A) ATP synthesis and heat generation will both increase.
B) ATP synthesis will increase, and heat generation will decrease.
C) ATP synthesis will decrease, and heat generation will increase.
D) ATP synthesis and heat generation will both decrease.
E) ATP synthesis and heat generation will stay the same.

Answers

Answer:

C) ATP synthesis will decrease, and heat generation will increase.

Explanation:

The energy for ATPs synthesis in the mitochondria is generated by the Proton Motive Force (PMF), which pumps protons across the intramembrane ;to set up electrochemical gradient for protons between the matrix and intramemebranes.

The energy generated with the influx of protons down their electrochemical gradients into the matrix is used for ATPs synthesis by the enzyme ATPase synthase.

Thermogenin however increases the permeability of inner mitochondria membrane to protons. Therefore the pumped protons in the intramemebranes leaked back into the mitochondria matrix,thus reducing the electrochemical gradient, inhibiting chemiosmosis, and therefore the energy for synthesis of ATPs by ATPase synthase enzyme in oxidation phosphorylation.

Therefore these uncoupling protein reduces the proton gradient meant for ATP synthesis.However because of the ability to generate heat in the body as non -shivering mechanism of heat generation, thermogenin will increase heat in the brown fat cells.

Explanation:

B) ATP synthesis will kncrease and heat generation will decrease

MULTIPLE CHOICE: Evidence for evolution includes all of the following except?a. punctuated sedimentation
b. similarities and differences in protein and DNA sequences between organisms
c. the fossil record
d. homologous structures

Answers

Evidence for evolution includes all of the options here (similarities and differences in protein and DNA sequences between organisms, the fossil record, and homologous structures) except for punctuated sedimentation.

Final answer:

Among the provided options, 'punctuated sedimentation' is not considered evidence for evolution while the fossil record, similarities and differences in protein and DNA sequences between organisms, and homologous structures are. Punctuated sedimentation is a geological term not directly related to biological evolution.

Explanation:

The question is asking which option is not evidence for evolution. Evolution is the process of change in all forms of life over generations.Fossil record, similarities and differences in protein and DNA sequences between organisms, and homologous structures are all direct evidence for evolution.

Punctuated sedimentation, however, is not a form of evidence for evolution. It is a term often used in geology to describe periods of deposition followed by periods of non-deposition or erosion, but it doesn't provide direct evidence for biological evolution.

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What is the process in which individuals with useful traits are more likely to survive and produce more offspring with those useful traits? A.use and disuse

B.acquired characteristics

C.natural selection

D.radiometric dating

Answers

The correct answer to the question above is (c.) natural selection. The natural selection is the process in which individual with useful traits are more likely to survive and produce more offspring with those useful traits.

c is the correct answer

Does the DNA in the skin cell have the same backbone as DNA in the brain cell of the same organism?

Answers

no it does not I hope this helps

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Gene is investigating what makes bread moldy. He put two identical slices of bread on separate plates. He made one slice moist and kept the other slice dry. He left the uncovered plates on a table for 2 hours. Then, he sealed them in plastic bags and put them in a dark, warm place. He looked at them each day for five days. After five days, he observed that 50 percent of the moist slice was moldy, and none of the dry slice was moldy. If Gene observed the slices for three more days, what would he most likely observe?

Type 2 diabetes mellitus may reflect declining receptor sensitivity to insulin rather than decreased insulin production. Most Type II diabetes do not produce insulin.True / False.

DNA polymerase fails to recognize that an incorrect nucleotide has been incorporated, resulting in a mismatch. Which repair pathway will correct this mistake?A. Base excision repairB. Mismatch repairC. Direct repair by methyltransferasesD. Nucleotide excision repair

Plants produce glucose through the process of photosynthesis. Potato plants convert these glucose monomers into starch, a polymer made up of many glucose molecules bonded together. The starch is then stored in special root tubers called potatoes. What process do potatoes use to convert glucose into starch?