Absolute time is the answer
The answer is d.their cells have some differences in the sequence of nucleotides in their nucleic acids
Human and mice is both mammals and have similar structure and metabolism. There should be no big differences in biological or organic molecule. The big differences should be the sequence of the nucleic acids in their DNA. Mice could produce similar protein in human, but the DNA is different.
The graafian follicle is the follicle that contains the secondary oocyte and after ovulation changes to a corpus leteum which secretes progesterone
First four are made of rock and rest are made of gases.
Atmospheres of all the planets are made of gases.
