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Roman55 [17]
3 years ago
13

How many veins and arteries are present between the maternal and the fetal circulatory system by the fifth week of pregnancy?

Biology
1 answer:
NemiM [27]3 years ago
8 0
One vein and Two arteries are present. 
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Which of the following is/are true?
Softa [21]

Answer: Only Options A, C and E are correct

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C) Sympatric speciation does not require geographic isolation.

E) Sympatric speciation can be due to sexual(mate) selection

Explanation:

Sympatric speciation is a random or naturally occurring event whereby organisms of the same species:

> live in the same territory or nearby territories ( i.e not living in isolation)

> DO NOT interbreed, but select a sexual mate from a much diverse territory which results in an uneven gene flow or disruption of alleles among the population of same species of the parents organisms.

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