Answer:
true
Explanation:
a virus needs a host to replicate its like fleas they lay eggs on dogs to replicate
Answer:
the 4th one The lumen, is my guess
Answer:
option B is correct
Explanation:
the effect of external physical factor on cell division is clearly seen on in density dependent inhibition( a phenomenon in which crowded cell stop dividing)
The arctic environment is deathly cold, hence the thick blubber on animals so they can handle freezing temperatures
