X and y chromosomes think of it like a phone charger you cant charge the phone unless the charger is plugged into the wall and the phone.
The answer is D because the heir the the force of gravity is stronger <span />
Internal organs and tissues of an organism
Answer:
riding the bike instead of the Car
Answer: Allopatric speciation , by geographical isolation
Explanation:
Allopatric speciation occurs when two populations are separated by geographical barrier from one another.
The differences in their traits as new species, is due to influence of selective pressures in their individual new environments on the morphological, physiological and behavioural features leading to the formation of a new species..