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Fed [463]
3 years ago
9

Explain the evolution of heart in vertebrates

Biology
1 answer:
Vera_Pavlovna [14]3 years ago
4 0

Answer:

The evolution of the heart is based on the separation of oxygenated blood from deoxygenated blood for efficient oxygen transport. pisces have a dual chambered heartwhile reptiles and amphibians are having a three chambered finally aves and mammals have four chambered hearts.

Explanation:

please mark as brilliant answer

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What makes two isotopes of the same element different from each other?
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Answer:

An isotope is one of two or more forms of the same chemical element. Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number, but a different number of neutrons giving each elemental isotope a different atomic weight.

Explanation:

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3 years ago
Mental illness may be the result of:<br> Environment <br> Heredity<br> Both<br> Neither
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Achondroplasia is a form of dwarfism inherited as a completely dominant trait. Two achondroplastic dwarfs have a dwarf child; la
yulyashka [42]

Answer:

There's 25% probability that their next child will be normal, and 75% of it being a dwarf.

Explanation:

Achondroplasia (A) is a dominant trait.

Two achondroplastic dwarfs (A_ x A_) have a dwarf child (A_) and a normal child (aa). The second child must be aa because if it had a dominant allele it would also be dwarf.

The only way for two achondroplastic parents to have a normal child is that <u>they are both heterozygous (Aa) for this gene.</u>

The cross Aa x Aa would produce the following offspring probabilities:

  • 1/4 AA - dwarf
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So there's 1/4=25% probability that their next child will be normal, and 3/4=75% of it being a dwarf.

7 0
3 years ago
In pea plants, the allele for smooth pods (S) is dominant over the allele for constricted pods (s).
steposvetlana [31]

Answer:

Ss

Explanation:

If you cross SS x ss all pea plants from the next gen will have Ss and because S is dominant to s all of them will have smooth pods.

5 0
2 years ago
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The diagram shows a basic food chain.
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Explanation:

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