The tiny hollow air sacs in the lungs where gas exchange takes place are the "a. alveoli". These are the "last stop" on the respiratory tree and are responsible for oxygen exchange.
Answer:
oxygen enters blood cells by 'diffusion'
Answer:
C. Bug C
Explanation:
It is able to camouflage itself with the environment and will be able to live longer because it won't be spotted by predators
Answer:
Through the use of The Endangered Species Act (1973). Alsom national parks are federal, not state land; therefore, the national government can control them.
Answer:
Option B, increasing the number and size of mitochondria
Explanation:
Mitochondria (power house of a cell) produce energy. When no exercise is done, the productivity of mitochondria reduces but it increases with regular exercise. In fact aerobic training helps mitochondria in making more energy by enhancing its efficiency. With one cycle of exercise, mitochondria produce 32 ATPs. Aerobic exercise allows more of oxygen to get to the muscle cells, the faster it happens the more energy is produced
Hence, option B is correct
