Answer:How long each heart beat are apart
Explanation:
the vein isnt conected to ur heart :P
Answer:
Schleiden, Schwann, and Virchow are the 3 major contributors to the cell theory.
The primary succession takes a long time to be done. the secondary succesion takes 200-500 years for completion. the secondary succession occurs in an area which has been denuded recently and lately inhabited. soil is present at the beginning of the secondary succession with some organisms. thank you for this question.
Not completely sure, but maybe C.?
