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Aleks [24]
4 years ago
10

Which describes a eukaryotic cell, but not a prokaryotic cell? a. uses DNA to control cell activities b. is surrounded by a cell

membrane c. makes and uses proteins d. contains DNA in a nucleus
Biology
1 answer:
11Alexandr11 [23.1K]4 years ago
4 0

Answer: Eukaryotic cells are larger than prokaryotic cells and have a “true” nucleus, membrane-bound organelles, and rod-shaped chromosomes. The nucleus houses the cell's DNA and directs the synthesis of proteins and ribosomes.

So..the answer should be D. Eukaryotic cells have a true membrane-bound nucleus and prokaryotes do not

All cells have a plasma membrane, ribosomes, cytoplasm, and DNA. Prokaryotic cells lack a nucleus and membrane-bound structures. Eukaryotic cells have a nucleus and membrane-bound structures called organelles.

So..it can't be C. or A. or even B.

Correct me if I'm wrong.

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In an ecosystem, energy is transferred from one organism occupying a trophic level to another as they feed on one another. The amount of energy that is being transferred as the chain progresses is called ECOLOGICAL EFFICIENCY. According to this question, the ecological efficiency at each trophic level of the ecosystem is 20%. This means that about 20% of energy units will be transferred to the next trophic level.

If the green plants of the ecosystem capture 100 units of energy, the amount of energy that will be available to support herbivores (plant eaters) is: 20% × 100units i.e. 20/100 × 100 = 20 units.

Also, the amount of energy that will be available to support carnivores subsequently will be 20% of 20 units i.e. 20/100 × 20 = 4 units.

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