Alligators,crocodiles,caimans and lizards
Answer:
SARS- CoV- 2 is a virus that infects human by the oral-respiratory way in which the virus enters the body and these viruses have spikes on their surface made of spike proteins that allow these viruses to bind with the infected cell.
The infected cells have ACE2 receptor that is protein present on the surface of the human cells. Binding allows the structural change in the virus to fuse and enter in the cell where viruses reproduce them selves with the cell with cell system.
Mechanical digestion is the breaking down of food into smaller pieces physically. Mechanical digestion begins in the mouth as the food is chewed.
but in the case of chemical digestion, it breaks the food into simpler nutrients that can be used by the cells. Chemical digestion begins in the mouth when food mixes with saliva.
for more refer to this:
Hope this helped
and ur welcm
The top layers are the youngest and the farther you go down, the older they get. I’ll put it in exact order in a minute.
Answer:nature selected for the more fit dark-colored papered moths in the new environment
Explanation:
it just seems like the best answer
