A, the endosymbiotic theory tells us that a looooong time ago, when there were only one-cell organisms, they kind of took in a bacteria. They profited from having a bacteria in it ( and I believe it is believed that this made it possible for organisms to have multiple cells, not sure) and these bacteria became mitonchondria/chloroplasts, thus answer A is the only one that doesn't support this theory.
A plant is the source of oxygen released into the air as a product of photosynthesis. Try to remember this
Plants Give Us Oxygen,
We Give Plants Carbon Dioxide.
Answer:
The degree of cortisol release during high intensity exercise depends in part on the time of day and the timing of meals. When exercise is performed during a time of already high cortisol levels (for example, in the morning), it doesn’t increase above already elevated levels.
Explanation:
When injected, benzedrine, dexedrine, and methamphetamine increase the release of serotonin, norepinephrine, and dopamine in the brain. Benzedrine, dexedrine, and methamphetamine are examples of amphetamines. They are stimulants, which speed up the messages travelling between the brain and the body. They may be used to treat attention deficit hyperactivity disorder.
Answer:
through their root systems, hope it helps