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joja [24]
3 years ago
11

As an environment changes, and some organisms have a higher fitness than other, natural selection acts directly on

Biology
1 answer:
olga2289 [7]3 years ago
6 0
Natural selection acts directly on those gene variations for traits or phenotypes.
The phenotype of an organism is the physical characteristic and is determined by the organism's genotype. Natural selection selects the genes that produce a certain phenotype by providing suitable conditions for a certain phenotype.
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What are two things that can make the pressure of a gas rise? (what are two variables you can change to increase the pressure) *
photoshop1234 [79]

Answer:

Temperature, pressure, volume and more

7 0
3 years ago
What are viable explanations for the consistent observation of a few black mice on the island?
PolarNik [594]

They undergone genetic mutation that influenced their fur color.

Mutations result either from accidents during the normal chemical transactions of DNA, often during replication, or from exposure to high-energy electromagnetic radiation (e.g., ultraviolet light or X-rays) or particle radiation or to highly reactive chemicals in the environment. Mutation can be of 4 types Germline mutations occur in gametes. Somatic mutations occur in other body cells. Chromosomal alterations are mutations that change chromosome structure. Point mutations change a single nucleotide. Frameshift mutations are additions or deletions of nucleotides that cause a shift in the reading frame. Factor that influenced  mutation are the size of the gene, its base composition, its position in the genome, and whether or not it is being actively transcribed influence its mutation rate.

To learn more about mutation ,here

brainly.com/question/13923224

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7 0
2 years ago
Soil is composed of all of the following EXCEPT _____________.
andrew-mc [135]

Parent rocks.

( I got it wrong when I put Inorganic materials)

7 0
3 years ago
Stromatolites are rocky structures that generally form in shallow waters from the binding of sediment by microbial biofilms. Str
hjlf

<u>Answer:</u>

Approximately, the oldest stromatolites are 3.6 billion years old on earth.

<u>Explanation:</u>

  • Stromatolites is not only oldest earths fossil but conspiracy in that they are singular visual portal in deep time on earth.
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  • Stromatolite buildings includes oldest fossils which are 3.5 billions old when the earth were too unfriendly to support life.
  • The study of  fossil age, evolutionary, method of formation are known as paleontology.
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7 0
3 years ago
Which area of the brain may be affected when a client with anxiety disorder shows symptoms related to respiratory activation and
Brilliant_brown [7]

Answer:Medulla and pons.

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Medulla controls respiration. It receives signals from chemoreceptors and send to muscles that allow respiration. It also regulate heart rate and blood pressure to ensure adequate blood supply circulate the body system.

Medulla also help in adjusting respiration when there is need and also generates normal breathing movements by stimulating the nerve that supplies the diaphragm. This pons are located under the medulla and it controls speed of involuntary respiration( respiration

Not under conscious control).

When a patience shows a disorder in respiration, invountary respiration, increase in heart rate its a disorder of Medulla and pons also called Brainstems

3 0
3 years ago
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