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lara [203]
3 years ago
6

The scientific process usually begins with a(n):

Biology
1 answer:
sasho [114]3 years ago
8 0
The answer is Observation. That's the first step. 
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Which blood vessels permit the exchange of oxygen, carbon dioxide, nutrients, and waste products with body cells?
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Answer: Capillaries

Explanation: Blood vessels have the same basic structures used to circulate blood of different composition to and away from the heart to the body. Blood vessels are arteries, veins and capillaries. Arteries carry oxygenated blood from the heart to the body and veins carry deoxygenated blood from the tissues to the heart.

Capillaries are the ones that work with body cells for exchange.They collect nutrients and oxygen from the blood to the cell and also collect carbon dioxide and waste from the cell to the blood which is transported to the vein where it travels via the venous system and goes through the heart, then to the lungs for gaseous exchange.

Therefore the enswer is, capillaries.

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Darcy and Raul are having difficulty conceiving a child. Darcy ovulates every 28 days, and Raul’s sperm count is normal. If we c
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Answer:

Sperm motility

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Sperm motility is the property of the sperms to move properly through the woman's reproductive system during the process of fecundation. The sperms need to move into the female reproductive tract to fertilize the ovum and thus form the egg cell.

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(Easy question) 15 points
Reika [66]

Answer:

D

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Its based on research but shows that it can be at a younger age as well

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PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER.
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<h3>The right answer is D </h3>

Explanation:

<h3>I hope you like it </h3>

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