Answer:
A concentration gradient must exist.
Explanation:
Answer:
Male baboons eavesdrop on mating couples to determine the status of their relationships, scientists show. Mating chacma baboons produce an incredible amount of noise; males grunt and females emit loud and long operatic calls. This is because higher-ranked, more dominant males otherwise monopolize high-ranked females.
Explanation:
Photosynthesis takes place inside chloroplasts.
I believe it’s producer :)
phytoplankton are responsible for producing up to 50% of the oxygen we breathe.
Answer:
contract
Electrical impulses from the brain tell the muscles to contract which moves the parts which causes pressure which squeezes the blood through the valves.
hope this helps xD