D) The AV valves are supported by chordae tendineae so that they do not blow back up into the atria during ventricular contraction.
Answer:
The answer is D.
Explanation:
Farmers have to continuously use the pesticides once used the first time because they have become an indispensable part of an agricultural cycle.
#teamtrees #WAP (Water And Plant)
True because Sigmund Freud (1890-1930) developed these collection of theories
Answer:
polar regions and nonpolar regions
Explanation:
if right braniliest? I only need one more
Clues such as fossils such as bones, footprints, tar, etc, preserved underground helped inform scientists. You can also count how old a tree is when you cut it open and there are some alive for thousands of years so that is a possible way.
