Aratio of 3: 1 in the phenotype of an organism occurs when
(a) the alleles are incompletely dominant.
(b) only recessive traits are involved.
(c) only dominant traits are involved.
(d) alleles segregate during meiosis.
(e) crossing over has occurred in anaphase ii.

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what do anaerobic organisms have in common with photosynthetic organisms?

they both appeared on earth at about the same time.

they both can only exist as single-celled organisms.

they both need an energy source in order to survive.

they both produce carbon dioxide as a waste product.

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convergent boundary.

explanation:

the type of boundary that is depicted in the image above is a convergent boundary.