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dsp73
3 years ago
6

What are the similarities between dna and rna molecules? (4 points)

Biology
1 answer:
almond37 [142]3 years ago
5 0

Answer:

a nitrogenous base, an amino acid, and a pentose sugar

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Met-Ser-Lys-Val-Phe

so none of the above

Explanation:

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3 years ago
Which of the following is an example of a closed system?
Yakvenalex [24]

Answer: B

Explanation: A closed system can be defined as a system that does not allow for an exchange of matter with its surroundings.

An estuary where fresh water and ocean water mix is not a good example of a closed system because fresh water and ocean water mix out in the open and matter is exchanged.

A living single-called organism such as phytoplankton does not constitute as a closed system because in order for the phytoplankton to be considered alive it needs to interact with its surroundings i.e light from the sun so photosynthesis (converting light energy into chemical energy to be used by organism) can occur. This also happens out in the open

A river that flows into the ocean does not fit into the closed system definition. This is because a river that flows into the ocean allows for itself (matter) to mix with that of the ocean in an open space (rivermouth).

Therefore option B is the answer because it fits the definition. A chemical reaction within the deep ocean organisms that allows them to glow happens within (inside) the organism, making this system closed, hence there is no exchange of matter with surroundings.

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3 years ago
Kris' case is unusual, because parkinson's disease usually takes many decades to kill enough neurons (cells in the brain) to cau
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-The neurons would be unable to transport substance between different parts of the cell.

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-The cytoskeleton is required for axon formation and axonal transport and also provides the structural basis for several specialized axonal structures, such as the axon initial segment and presynaptic boutons.


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Which of the following is a river in Latin America?
Nimfa-mama [501]

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my caca is green red and blue no cap

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