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Ludmilka [50]
3 years ago
5

Which characteristic contributes MOST to the survival of the different birds on the islands?

Biology
1 answer:
Roman55 [17]3 years ago
3 0
The main food sources of the birds( the plentiful recourses within the environment occupied by the species)
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The slow accumulation of genetic changes to an influenza virus over time is referred to as _______.
Ivenika [448]

Answer:

<u>Antigenic drift</u> refers to the slow accumulation of genetic changes to an influenza virus over time.

Explanation:

Antigenic drift is defined as the mechanism by which viruses undergo variation. This mechanism involves the slow accumulation of mutations in the viral genes, that are responsible for coding the antibody binding sites. This leads to the formation of a new strain of virus, which can't be inhibited by the old antibodies. Due to this, the virus can easily spread the disease.

The antigenic drift occurs in the influenza A virus and also the influenza B viruses.

Therefore, <u>Antigenic drift refers to the slow accumulation of genetic changes to an influenza virus over time.</u>          

8 0
3 years ago
When Native Americans first encountered Europeans, what led to the European diseases being so deadly?
Anarel [89]

Answer:

The War I think

Explanation:

What led to the European disease was the cause of the war that made many Americans come and then it called the disease

6 0
3 years ago
What organs/systems is affected by the sympathetic nervous system but is NOT affected by the parasympathetic nervous system?
Mariulka [41]

Answer: cellular metabolism

Explanation:

Cellular metabolism is chemical reactions that takes place in living organisms so that they will be able to maintain life. Cellular metabolism is made up of thousands of genes, metabolites and proteins.

Cellular metabolism is affected by the sympathetic nervous system but is not affected by the parasympathetic nervous system.

8 0
3 years ago
In summer squash, white fruit color (W) is dominant over yellow fruit color (w) and disk shaped fruit (D) is dominant over spher
dangina [55]

Answer:

Genotypic ratio = 16 WwDd: 0

Phenotypic ratio = 16 white, disk shaped fruit : 0 yellow, sphere shaped fruit

Explanation:

This question involves two different genes coding for fruit color and fruit shape respectively. The allele for white fruit color (W) is dominant over yellow fruit color (w) and disk shaped fruit (D) is dominant over sphere-shaped fruit (d).

According to this question, If a squash plant pure-breeding for white, disk shaped fruit (WWDD) is crossed with a plant pure breeding for yellow, sphere shaped fruit (wwdd), the following gametes will be produced by each GAMETE:

WWDD - WD, WD, WD, WD

wwdd - wd, wd, wd, wd

Using these gametes in a punnet square, all of the offsprings will have genotype WwDd, which is phenotypically white and disk shaped fruit.

The genotypic ratio is 4 WwDd: 0

The phenotypic ratio is 16 white, disk shaped fruit : 0 yellow, sphere shaped fruit.

8 0
2 years ago
In _______ reactions, the products have higher energy than the reactants, and in _________ reactions, the reactants have higher
saul85 [17]
In exothermic reactions, the products have higher energy than the reactants, and in endothermic reactions, the reactants have higher energy than the products.
7 0
3 years ago
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