Volcanic eruptions, floods, landslides
Answer:
the middle east region was not always a vast desert
1, fact.
2, reasoned judgement.
3, opinion.
Answer:
propulsion of a sperm cells occurs due to the sperm's tail containing a large number of proton channels called Hv1 and It gets energy from the seminal plasma.
Explanation:
Ribosomes, because they produce protein for the cell.
