How does evolution occur? choose best answer!?

Question

How does evolution occur? Help!?

Question: How does evolution occur?

Choose the best answer:

a. Through changes in gene frequencies
b. through mutated RNA
c. Through protein mutations
d. Through the mutations that happen during natural selection.

Answer 1

Mutations don't happen during natural selection. The mutations occur and are expressed as alleles... The successful alleles help the organism survive longer and make them more attractive to mates... this is natural selection. The mutation happens first.

Best answer for that multiple choice question i would have to say is (A) since through natural selection gene frequencies that become more common (are selected more often) survive. When the environment changes and the organism must adapt the gene frequencies are again subject to change.

Answer 2

Think!!! What difference does mutated RNA make? The same for protein mutations. Mutations that happen during natural selection is a tautology. So, as the proceeding answer told you, changes in gene frequency is the definition of evolution.

Answer 3

I would say the number one way evolution occurs is none of these. Natural Selection...the survival or the fittest and best adapted. The runt of the litter will probably not survive and etc. The stronger, healthier, best adapting to their immediate environment, survival means that genetic material is passed along. Yes there are mutations occur but those are rare. Evolution is very very slow and is usually minor adaptations that develop due to environment. Look at the Galapagos Islands and it animals that adapted in different ways. There is a lot of evidence for evolution of this type.

Answer 4

Well the technical answer is C since it is just mutation and could be good or bad evolution but as society tends to view it, would be D since the bad mutations are killed off due to natural selection and the good ones are retained by same principle

Answer 5

D
As animals accidentally mutate, it may keep that animal from dying which would cause the mutation to be passed on to it's offspring. For example (this is the one I remember from school) during the industrial age, at the height of steel production and assembly lines, there was a study done on moths. Many of the moths surrounding a mill were black because they blended in with the oil/soot stain on the trees. It was camoflage and protected them from predators. Prior to this, the moths were primarily a light brown, which blended in with the trees before they were stained. A few moths probably were mutated into a dark color that would have normally made them stand out and be first eaten by predators, but as they blended in better, the brown moths were the ones that stood out.

Answer 6

Hello;

I would say A. What is evolution?

Biological evolution refers to the cumulative changes that occur in a population over time. These changes are produced at the genetic level as organisms' genes mutate and/or recombine in different ways during reproduction and are passed on to future generations. Sometimes, individuals inherit new characteristics that give them a survival and reproductive advantage in their local environments; these characteristics tend to increase in frequency in the population, while those that are disadvantageous decrease in frequency. This process of differential survival and reproduction is known as natural selection. Non-genetic changes that occur during an organism's life span, such as increases in muscle mass due to exercise and diet, cannot be passed on to the next generation and are not examples of evolution.

Isn't evolution just a theory that remains unproven?

In science, a theory is a rigorously tested statement of general principles that explains observable and recorded aspects of the world. A scientific theory therefore describes a higher level of understanding that ties "facts" together. A scientific theory stands until proven wrong -- it is never proven correct.

What do genes have to do with evolution?

Genes are the portions of an organism's DNA that carry the code responsible for building that organism in a very specific way. Genes -- and, thus, the traits they code for -- are passed from parent to offspring. From generation to generation, well-understood molecular mechanisms reshuffle, duplicate, and alter genes in a way that produces genetic variation. This variation is the raw material for evolution.

Is evolution a random process?

Evolution is not a random process. The genetic variation on which natural selection acts may occur randomly, but natural selection itself is not random at all. The survival and reproductive success of an individual is directly related to the ways its inherited traits function in the context of its local environment. Whether or not an individual survives and reproduces depends on whether it has genes that produce traits that are well adapted to its environment.


Thanks 4 the question! I hope that helps u!

Answer 7

All of those answers suck!
Evolution occurs through mutations and chromosomal events, that are then sorted through genetic drift or selection.

If I had to pick just ONE of the above, I'd pick a.
D is probably the answer your teacher wants, though, even though the way it's phrased shows that whomever wrote it doesn't understand evolution.

Answer 8

d. Through the mutations that happen during natural selection.

Answer 9

It's B or D but I'll go with D even though it's worded funny.

Mutations in DNA cause changes in species, mostly harmful, and natural selection weeds out the bad ones and promotes the good ones (good being surviving longer to reproduce).

Answer 10

Hi. I think d. Without something to weed out non-useful mutations there would be nothing to evolve for.