Environmental factors do influence natural selection because they can increase or decrease the population of a species, by selecting those with only favorable traits.
Answer:
True
Explanation:
Periaqueductal gray matter is found in the middle portion of brain. When this grey matter is stimulated it activates neurons that releases enkephalin. Enkephalin further direct the stimulation to the raphe nuclei with in the brain stem that releases serotonin. In this process, the ascending and descending axons are released from
a) subcortical nuclei
b) spinal trigeminal nuclei
c) the spinal cord
Hence, the given statement is true
It is autosomal. However I'm unsure what you would do to explain.
BMR or Basal Metabolic Rate
something like tunica intima/ interna and tunica media
