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DedPeter [7]
3 years ago
10

How does natural selection negatively impact humans? Use complete sentences to explain with the help of an example.

Biology
1 answer:
Neko [114]3 years ago
5 0

Answer:

In general, negative selection eliminates from the population very harmful changes to proteins that kill or stop reproduction. ... The authors also found a correlation between genes predicted to be under negative selection and genes implicated in certain hereditary diseases

Explanation:

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The ability of muscle to shorten forcibly when adequately stimulated is known as ________
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The ability of muscle to shorten forcibly when adequately stimulated is known as <u>contractility.</u>

Explanation:

  • Contractility is defined as the ability of muscle cells to contract forcefully to bring about movement in body organs.
  • The folding of arms are results of contractility of biceps and triceps.
  • Contractility of cardiac muscle to regulate pumping of heart is again a result of contractility of myocardial muscle.
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Which statements about salt water are true? Check all that apply.
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2. Fresh water is essential to all life on earth.

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4. Most of earth's water is stored in the oceans

Explanation:

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Name the different divisions of animals according to their habitats​
sergiy2304 [10]

Explanation:

Terrestial Animals - Animals which can only live on Land.Examples:- BEAR- CAT- DOG- DEER

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Examples:- FISH- OCTOPUSES- LOBSTERS- SEAHORSE

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I’ll give you some key points and after that you should be fine, tide, swept underneath and over, density differences and climate change
7 0
3 years ago
Need help with these questions answer what you can
OlgaM077 [116]

Answer 1:

The mutation shown is point mutation.

A point mutation can be described as a type of mutation in which only a single nucleotide of a sequence is either:

  • changed
  • added
  • deleted

The addition of the single nucleotide will cause the entire open reading frame to be changed. The amino acid sequence will change entirely from the position where the insertion mutation occurs. This is because the code for making amino acids works on a three base pattern. The reading of the three bases will be altered completely by the addition of just a single nucleotide.

Answer 2:

No, the resulting protein will not be altered.

The genetic code occurs in a linear sequence with triplet format. The change in a single base will cause the wrong amino acids to be formed. However, if the different code is common for the same amino acid then there will be no effect on the amino acid being formed.

<em>For example, the code GUA makes the amino acid Valine. If a mutation occurs and the code becomes GUU instead of GUA, then the resulting amino acid formed will also be Valine. Hence, there will be no alternation in the formation of the protein.</em>

Answer 3:

Melanoma cancer is the type of skin cancer which is associated with cancer from sun light. It is mainly caused due to the harmful ultraviolet rays which act as a mutagen.

<em>The mutations might keep coming back because although the growth have been removed, the other skin cells of the body might still have the mutation in them. As a result, growth will be seen again in the skin cells which might occur again and again. </em>

<em />

Explanation:

7 0
3 years ago
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