Answer:
C. At least five mass-extinction events have occurred during the last 500 million years.
Explanation:
- The history of mass extinct is related to the five mass extinctions that are caused over by the 350 million years n which many species have disappeared in there short geologic time.
- A massive extinction is caused in the Permian Triassic extinction event i.e about 250 mn years ago which on an estimate has killed 90% of the species.
- The Cretaceous–Paleogene extinction event that occurred over 66 million years ago is known to have wiped out the dinosaurs and many other species.
Crustacea(ns) form a very large group of arthropods.
Onion (Allium) and Banana (Musa) are both eukaryotes and both have cell walls.
Answer:
Water leaves the cell by osmosis, the cytoplasm pulls away from the cell wall and the cell becomes flaccid making the plant wilt
