Phytoplankton are the aquatic producers that form the bottom of aquatic food webs, but their total biomass at any given time is actually very small. They are able to support the higher trophic levels because they grow and reproduce much more quickly than the other organisms in the food web.
Phytoplankton are the aquatic producers that form the bottom of aquatic food webs, but their total biomass at any given time is actually very small. They are able to support the higher trophic levels because they grow and reproduce much more quickly than the other organisms in the food web.
Breathing increases during exercise because the body is demanding more oxygen for the muscles. The hypothalamus detects the increased carbon dioxide in the blood dur9ng exercise and its commands the lungs to breath faster and deeper. When exercise stops, the body is restored to resting through homeostasis.
