The answer is B. The reason why is because natural selection causes changes in a populations over many generations, and in this case the change that is being made is the that the population is becoming immune to a disease.
Answer: Option D) all of these options
Explanation:
Yes! Neurotransmitters are chemical compounds that are produced from the terminal of a neuron and bound by specific protein in the adjacent neuron where it helps to transmits a nerve impulse.
Neurotransmitters can be:
- Excitatory such as acetylcholine that cause muscle to contract and gland cells to produce secretions (i.e neuron will fire)
- Or inhibitory such as glycine which inhibits the contractions of muscles (i.e neuron did not fire)
Thus, neurotransmitters do all of the functions provided
Answer: A. Heat within the Earth
Explanation: the earth’s crust floats on liquid rock. The convection currents caused by the Earth’s rotation cause movement at the surface.
Yes! You're right. It is evaporation. Since evaporation is a cooling process, it takes the heat of a surface away. - releasing heat
