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Blababa [14]
3 years ago
7

A scientist is observing a eukaryotic cell and a prokaryotic cell. which structure could she only observe in the eukaryotic cell

?
A.) cytoplasm

B.) DNA

C.) ribsomes

D.) Nucleus​
Biology
2 answers:
vodomira [7]3 years ago
5 0
Answer: D.) Nucleus

Explanation: In the question, we are told to find a structure that is found ONLY in eukaryotic cells. Because of this, we have to eliminate any option that is found only in prokaryotic cells, or any that is found in both prokaryotic and eukaryotic cells. In options A-C, we are given structures found in both types of cells. The cytoplasm, DNA, and ribosomes differ in each type of cell; however, nevertheless, they do not only appear in eukaryotic cells. This makes nucleus the only valid option, as it is only found in eukaryotic cells.

Hope this helps! Comment below for more questions.
nalin [4]3 years ago
4 0

Answer:

The answer is D. Nucleus are only found in Eukaryotes.

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The surface area/volume ratio is an important factor for one celled organisms. As a cell's volume grows, its surface area/volume
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Answer

Use Mitosis to divide and create daughter cells.

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Single-celled organisms use mitosis to reproduce. Both growth and reproduction in unicellular organisms are mutually inclusive. When the cell’s volume grows, the ratio of surface area to volume decreases creating challenges in acquisition of nutrients because there will be too much cytoplasm for a given amount of nuclear material , thus the cell divides by mitosis to reproduce daughter cells and the process begins again.

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g If a colony of bacteria starts with 1 bacterium and doubles in number every 20 ​minutes, how many bacteria will the colony con
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Answer: 2.81 x 10∧14 baterias after 16 hours.

Explanation:

Hi, first we have to find how many 20 minute intervals are in 16 hours.

If 1 hour = 60 min, 16hours = 960 minutes (16 h x 60 min / 1 h)

If we divide the 960 minutes (16 hours) by 20 minutes we obtain 48. (960/48)

There are 48 twenty minutes intervals in 16 hours.

Now we have to apply the exponential growth formula:

P (t) = Po (1 +r) ∧t

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Replacing with the values given:

P (t) = 1 (1 + 1) ∧48= 2.81 x 10∧14

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