Why is it necessary for animals to have a circulatory system?

O to move blood

O to breathe

O to maintain homeostasis

O to exchange materials with its environment

3. When did the human population begin to grow at a faster rate than at any other time in history? A 8,000 years ago B 20,000 years ago C 300 years ago D 1,000 years ago

Which part of photosynthesis produces glucose and ADP? A. Photon collisions B. Chemosynthesis C. The light reactions D. The Calvin cycle

What is a good sentence for eukaryote

What happens when the seafloor spreads? Basalt cools to form a new crust near the mid-ocean rift. Old crust moves closer together. New crust moves away from the mid-ocean rift. New crust forms near the continental slope.

Without this one characteristic, the species would become extinct

What is sublimatoin

Which sequence shows the correct path of blood flow between the heart and lungs?

What is the mass of a light bulb and paper clip together

At is the difference between pseudoscience and science

look at the ocean system below plankton, shrimp, salmon, human what will most likely happen if the plankton population decrease in this ocean systems? A. it will be more difficult for salmon to find food. B more shrimp will move into the area C.