What are the answer choices!
Answer: there made up of carbon, oxygen, hydrogen, and nitrogen
Explanation: I learNed it in science class
Answer:
Autoimmune theory
Explanation:
Alzheimer's disease is the most common type of neurocognitive disorder, which usually occurs after the age of sixty-five and is characterized mainly by memory impairment.
The autoimmune theory suggests that <u>the immune system is prearranged so that it becomes unable to identify the body's proteins from foreign ones</u>. As a result, the immune system attacks its own cells.
Answer:The water can come from rain and this can be called chemical weathering or it can break apart rocks in a process of Frost wedging.
Explanation:
Frost wedging is considered mechanical weathering and it breaks rocks by freezing water in which expands the water by 9% every time it freezes expanding a crack or cracks in a rock more and more
<span>blood, lungs and blood vessels that make up the circulatory system.
... The network of veins, arteries and blood vessels transports
oxygenated blood from the heart, delivers oxygen and nutrients to the
body's cells and then returns deoxygenated blood back to the heart</span>