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The answer is B which is "<span>All carry blood away from the heart."
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The walls of the arteries vs veins have different thickness in each is that <span>tunica media is thicker than the tunica externa in arteries and that the opposite is true in veins (tunica externa is thicker than the tunica media)</span>
C. They are not enclosed by a membrane.
D is incorrect because Ribosomes do not contain DNA, the nucleolus does.
B is also incorrect because they aren't located outside the cell, they're in the cell, on the endoplasmic reticulum.
Hoped this helped :)
Answer:
In a population, a specific gene has two alleles, 'A' and 'a.' Individuals with
genotype 'aa' die in early childhood. Individuals with genotype 'Aa' have a
higher rate of surviving and reproducing than individuals with genotype 'AA.'
This phenomenon is called survival of the fittest, Darwins law which entails the fittest organisms survives while the ones that could not would go into extinction
Explanation:
Provide organs and muscles with the oxygen they need to function
