Hypertension or simply termed as high blood pressure is a condition
In the cardiac system where the blood pressure and transfer from one part of
the body to another exceeds the normal levels of the body. The heart is
strongly pumping blood throughout the body which is caused by either lipid
deposits in the vessels or in the heart itself.
Hence hypertension contributes to the conditions that
already exists such as stress, or existing disorders and worsen it.
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Traits are inherited trough the parents genes that are passed to the offspring trough both parents reproductive cells, that contain genes in their nucleus.
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If you are implying one these choices not needed for survival it would be parents only when you can survive on your own (I'm not that sure but I hope this helped the slightest but)
Answer:
Coelenterates are the first invertebrates to develop a true nervous system.