Which occurs in the integumentary system after a deep injury occurs to the system? Multiple choice question.

A)
Red blood cells fight off pathogens.

B)
Blood quickly clots to form a scab.

C)
Epidermis cells increase their size.

D)
Dermis cells close the injured vein.

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

What would happen if the krill were removed from the food web

“in 1492 columbus sailed the ocean blue” is an example of: a)explicit memory b) procedural memory c) semantic memory d)episodic memory