Answer:atmosphere
Explanation:Earth's atmosphere is a layer of gases surrounding the planet Earth and retained by the Earth's gravity. It contains roughly 78% nitrogen and 21% oxygen 0.97% argon and carbon dioxide 0.04% trace amounts of other gases, and water vapor. This mixture of gases is commonly known as air.
Answer;
REM sleep
Xander is probably experiencing REM sleep.
Explanation;
-REM sleep is a stage of sleep that is characterized by low muscle tone, rapid eye movements and dreams. It is present in all mammals and has unique physiologic properties that distinguish it from non-REM sleep.
-It is believed that the chemical and electrical activity that regulate this sleep phase originate in the brain stem, and this is most notably characterized by a combination of an abundance of acetylcholine (a neurotransmitter), and the almost complete absence of serotonin, histamine, and norepinephrine.
The possible answers are :
A. it makes up the outer layer of the brain
B. it's composed of an axon.
C. it transmits nerve signals from one area of the CNS to another.
<span>D. it's composed of dendrites
The correct answers are A and D
The gray matter of the brain is made out of nerve cell bodies, dendrites, and unmyelinated axons. The outer layer of the brain's cortex is made out of the gray matter and the inner layers are made out of white matter.
The white matter is made out of </span>myelinated axons that transmit nerve signals throughout the nervous system. The white matter is white because the myelin that surrounds the axons is white.
Answer in the gene for that characteristic cause these different forms. ... These two copies of the gene contained in your chromosomes influence the way your cells work. The two alleles in a gene pair are inherited, one from each parent. Alleles interact with each other in different ways