Question

which of the following can utilize both mitosis and meiosis in the correct circumstances?
A) a haploid animal cell
B) a diploid cell from a plant stern
C) any diploid animal cell
D) a plantlike protist
E) an archaebacterium

Answer 1

We're gonna solve this through elimination.

- since meiosis is only done by eukaryotes (in bacteria, you have other forms of genetic recombination), we can exclude E).
- haploid animal cells can not do a meiosis, since you need diploidy to start a recombination. A) is not possible either.
- not any animal cells can do meiosis. this would lead to many many cancers, by the way. so C) is wrong, too. same goes for plants: there are equivalents to sperm cells and egg cells here, so diploid cells from plants won't do meiosis either: B) is wrong.

That leaves answer D). It is known that some protists, like plasmodium falciparum, have complex life cycles, which enables them to infect so many people with diseases like malaria. I am not 100% sure whether the same goes for autotroph protists, but the requirements are all fulfilled:
They are diploid, could do meiosis and also mitosis. So I think that your answer is D).

Answer 2

thank you so much