What is meant by the statement "Evolution may proceed along 'genetic lines of least resistance'"?

Biology

1 answer:

Ivan4 years ago

6 0

Answer:

C. Characters with little genetic variation will constrain the rate of natural selection

Explanation:

Natural selection can have an effect only as long as there are variations on characters on which it can select upon. Genetic variation is independent of the environment or the needs that a species may have to become better adapted to its changing environment. In other words, genetic mutations are the raw material on which natural selection can work. If there is a low rate for mutations to occur, then natural selection will proceed at a slow pace. The opposite is also true. Since mutation rate may be more frequent at some locations in a gene than at others, it can be predicted that the characters coded in that gene location will be more likely to be affected by natural selection and therefore what phenotype may be molded by natural selection.

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What is the dietary iron of food sources not associated with hemoglobin called?

photoshop1234 [79]

Hello!

I believe the correct answer would be: Nonheme Iron.

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True or false? One possible way to alter chromatin structure such that genes could be transcribed would be to make histone prote

Dmitrij [34]

Answer:

False

Explanation:

The histones that are more positively charged, tight hardly to negatively charged DNA. So, enzymes, such as acetyltransferases, that reduce the positive charge of histones promote transcription.

Chromatin structure and its modifications can change the package of the DNA and consequently, alter the gene expression. The most common modifications of the chromatin are covalent modifications such as acetylation/deacetylation (by acetyltransferases and eacetylases), methylation (by methyltransferases), and phosphorylation (by kinases). This is the way of gene expression regulation.

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3 years ago

Why does sexual reproduction produce more genetic variability in a population than asexual reproduction?

musickatia [10]

Because with sexual reproduction the offspring is getting Genetic material from both the mother and father but during asexual reproduction the offspring only gets genetic material from its one and only parent

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3 years ago

Name two categories used to classify properties of matter

Igoryamba

The two cateogaries of matter are intensive and extensive.

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4 years ago

Lisa had 20 grams of water. She poured out 15 grams. Which of the following physical properties of the water changes? (4 points)

Black_prince [1.1K]

Answer:

Volume

Explanation:

The boiling point and density of water never changes, no matter how much you add

So the answer CAN'T be Boiling point or Density

Electrical Conductivity changes <em>only when the number of ions in a solution changes</em>

So it CAN'T be Electrical Conductivity

It has to be VOLUME because volume is the only physical property that changes when you add or take away liquid from a liquidous mixture

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