Answer: A.
Explanation:
There core, or inner layer, is the most dense due to its magnetic pole, not to mention, the core is comprised of multiple molten materials, heated so hot, tht it practically exist between two states of matter simultaneously.
<span>Plants absorb energy from the sun and use photosynthesis to make sugars. Animals have mitochondria that use the sugars provided by plants to produce their own cellular energy. If there is not plant animal will have difficulty in getting energy. Also there are competition on the part of animals and human. I hope it helps. </span>
Cellular respiration can be aerobic or anaerobic, but normally when people say cellular respiration they mean AEROBIC respiration. Aerobic means oxygen is needed while anaerobic means oxygen is not needed
Answer:
The influx of calcium ions.
Explanation:
The influx of calcium ions at a certain point produces phase of the action potential also called depolarization which results in the ion movement changes the membrane potential from negative to positive inside the cell.
In action potential, calcium ions may control gene transcription, cell excitability, and neurotransmitter release. In chemical synapses, the influx of calcium ions leads to vesicles filled with neurotransmitters move to the surface of the cell, and into the synaptic cleft release their contents.
False,<span>The exchange of oxygen and carbon dioxide between the air and the bloodstream occurs in the</span>alveoli of the lungs.
