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Scrat [10]
3 years ago
5

Which structure is found in all cells? A. Chloroplasts B. A nucleus C. Ribosomes D. Lysosomes

Biology
2 answers:
kifflom [539]3 years ago
4 0
Your answer is B. a nucleus
Step2247 [10]3 years ago
3 0
The answer is C ribosomes
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A protein containing several proline residues is:
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The correct answer is b. likely to be found in beta turns.

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6 0
3 years ago
Which blood vessels permit the exchange of oxygen, carbon dioxide, nutrients, and waste products with body cells?
Greeley [361]

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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.

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8 0
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