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Sidana [21]
3 years ago
14

Which of the following is not a requirement of natural selection?

Biology
1 answer:
yKpoI14uk [10]3 years ago
8 0

Answer: catastrophic events.

Explanation:

Several factors besides Natural Selection, such as gene flow, mutations, and genetic drift promote the evolution of populations, but only Natural Selection results in adaptations. Natural selection can explain the adaptation and specialization of living beings and depends on the existence of reproduction, heritable phenotypic variation, to some degree, and especially the difference of fitness among individuals. Reproductive differential and/or mortality favors certain genotypes over generations and may lead to loss or fixation of alleles over time within populations. Natural selection can act in different ways, depending on the variants phenotypic phenomena and the adaptive values associated with them, which may be disruptive, directional or stabilizing. Based in this, we can affim the catastrophic events are not required for natural selction to occur.

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Explain how the terms oxidation and reduction apply even when there is only a partial shift of electrons between atoms linked by
aliina [53]

Explanation:

In a covalent bond, there is sharing of the donated electron by two atomic species having very small electronegative differences between them.

Oxidation is the loss of electrons by a specie and it usually lead to an increase in oxidation number.

Reduction is the gain of electrons by a specie. It leads to a lower oxidation number.

Since there is no actual loss of gain of electrons in a covalent body, the electronegativiy is at work.

Electronegativity is the ability of a specie to draw the shared electrons more to itself in a covalent bond.

  • Between two atoms bonded covalently, the more electronegative specie draws the electrons closer.
  • This leaves a partial negative charge on it.
  • The other electron then becomes partially positively charged.
  • We can then say, the more electronegative specie undergoes reduction.
  • The less electronegative one undergoes oxidation.

learn more:

Covalent bond brainly.com/question/3064597

Oxidation and reduction brainly.com/question/2278247

#learnwithBrainly

5 0
3 years ago
The analysis of total microbial genomes in an environment is called _________________________and the total microbial genomes in
Levart [38]

The analysis of total microbial genomes in an environment is called metagenomics and the total microbial genomes in an environment (or the total microbial community itself) is called a microbiome.

<h3><u>Explanation:</u></h3>

The study that is associated with the genetic materials that are obtained directly form the sample in an environment refers to the term Meta genomics or  ecogenomics or community genomics. It can be considered as the process through which the  meta genome is produced.

The genetic material of the microbes such as  fungi, bacteria, viruses and protozoa refers to microbiome. These microbes lives inside the body of humans. The weight may range upto 5 pounds for these microbiomes. Micorbiomes are the total number of micro genomes that are present in the environment.

5 0
3 years ago
Which of the following factors is most likely to contribute to gene flow between the
Tatiana [17]

Answer:

D.migration

Explanation:

4 0
3 years ago
Which best explains how the body mantens homeostats)
jek_recluse [69]

Answer:

All systems work together to stabilize the body.

Explanation:

Certain systems work with each other in order to maintain homeostasis, which is essential for the body. For example, when blood circulates through the digestive system, it picks up nutrients absorbed by the body during its last meal. Additionally, blood carries oxygen taken in by the lungs. The circulatory system works with the respiratory system here to distribute oxygen to other parts of the body.

6 0
3 years ago
Piper touches a block of ice, and she feels that it is very cold. How does she feel the sensation of cold?
NemiM [27]

The stimuli sends a message to the brain

Hope this helps

8 0
3 years ago
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