Natural selection is the process where organisms that are best suited to their environment survive and pass on their genetic traits in increasing number to successive generations. At the same time, organisms that are less adapted fail to survive or multiply at a lower rate, and tend to be eliminated from the ecosystem.
The brain requires blood flow to function properly, and cutting off blood flow to some of the brain's most important functions can be extremely harmful. Paralysis, sensory deficits, or even a stroke could result from a blockage of blood flow in the anterior cerebral arteries.
<h3>What causes a stroke?</h3>
A blocked artery (ischemic stroke) or a blood vessel leak or burst are the two basic causes of stroke (hemorrhagic stroke). Transient ischemic attacks (TIAs), which are brief interruptions in blood supply to the brain that don't persist long, can occur in some persons.
<h3>What happens when you stroke?</h3>
Depending on where in the brain the stroke occurs and how many brain cells are lost, the effects of a stroke might vary. Paralysis, trouble swallowing or communicating, memory loss, discomfort, emotional changes, and behavioral problems can all be brought on by a stroke.
<h3>What are the 4 signs of stroke?</h3>
- Face, arm, or leg weakness that appears out of nowhere (especially on one side of the body).
- abrupt difficulty speaking or understanding speech.
- sudden problem with eyes' eyesight.
- sudden dizziness or difficulties walking,
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DNA contains the blueprint for producing the whole organism.
Answer:
Explanation:
Animals obtain carbon by eating and gaining nutrients. This gives them carbon. They get hydrogen by water and glucose. They get nitrogen from food.
