Biology, 29.01.2020 03:57 Bescobar017

Explain what it means for a section of dna to be considered a molecular clock. be sure to discuss the importance of neutral mutations in this measure of time.

Answers: 2

Show answers

Answers

Answer from: rina62

Neutral mutations are neither harmful nor beneficial.

Therefore, they are invisible to natural selection. (Since they neither improve nor worsen one individual's chances of survival and reproduction over another.)

However neutral mutations can still spread into the population by just random replications and matings. This is called genetic drift.

In other words, they are 'silent'. They are mutations that exist and propagate in populations, but seem to have no effect at all.

The reason they can become important to evolution is that a day can come when they *do* have an effect. In other words, even though an individual mutation may have no immediate effect on survival or reproduction, a *combination* of neutral mutations may provide some new benefit or harm ... at which point natural selection *will* act on that combination.

I hope my answer has come to your help. Thank you for posting your question here in . We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

Answer from: Quest

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.

Answer from: Quest

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.

Another question on Biology

Biology, 22.06.2019 05:30

This question is only for applicants to scholars for medicine or scholars for dental medicine: what aspects about medicine (or dental medicine) intrigue you? describe how these aspects influence your life. (100-650 words)

Answers: 2

Answer

Biology, 22.06.2019 10:20

During convection, less dense fluid rises and denser fluid sinks.

Answers: 2

Answer

Biology, 22.06.2019 12:10

What mistake did john needham make that caused him to conclude that spontaneous generation for microorganisms occurred? a. he re-contaminated his boiled broth solutions. b. he destroyed the vital force in the solutions. c. he did not boil his broth solutions, only warmed them. d. he failed to seal his flasks of boiled broth. e. he allowed his assistant to conduct the experiment which he did not monitor closely.

Answers: 2

Answer

Biology, 22.06.2019 19:00

Which of the following is the best definition of a eukaryota? a. a one-celled organism that does not have a membrane-bound nucleus b. a one-celled organism that does not have a cell wall c. an organism whose cells each contain a membrane-bound nucleus d. an organism whose cells each have a cell wall

Answers: 2

Answer

You know the right answer?

Explain what it means for a section of dna to be considered a molecular clock. be sure to discuss th...

Questions