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Andre45 [30]
3 years ago
13

Which best describes the first organisms on earth?

Biology
1 answer:
iris [78.8K]3 years ago
8 0

Answer:

D. Simple Prokaryotes

Explanation:

Apex*

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What are the two major types of cells?
ankoles [38]

Answer:

B. Prokaryotic and Eukaryotic

Explanation:

Cells are of two types: eukaryotic, which contain a nucleus, and prokaryotic, which do not.

Hope this helps! :)

8 0
3 years ago
The suprachiasmatic nucleus of the ________ is responsible for regulating your circadian rhythms. In this way it plays a very im
Natalija [7]

Answer:

tiny region of the brain in the hypothalamus, situated directly above the optic chiasm.

3 0
3 years ago
Humans and other animals regulate cell growth and cell division. In humans which of these types of cells generally do NOT divide
nevsk [136]

Answer:

skin cells and muscles divide

Explanation: common sense cse we grow

6 0
3 years ago
The Ebola virus enters a human through the openings in the body or through the skin itself. Once inside, the virus attaches to a
agasfer [191]
<h2>Answer: <u><em>How does the Ebola virus infect people?</em></u></h2>

<em><u>Ebola virus contains a type of genetic material called RNA, which is similar to DNA and contains the blueprint for assembling new virus particles.  Unlike animals and plants, which also use DNA as a repository of information, viruses are not technically alive because they are incapable of replicating without help.  In order to create new viruses, the virus must infiltrate a living cell, where it hijacks the host cell’s machinery to fulfill its own goals.  In order to get into the cell, Ebola must travel through the cell membrane, which is a barrier that protects the cell from its environment.  However, all cells need nutrients, which must have ways of entering the cell; the viruses hitch a ride into the cell via one of these established nutrient-uptake entryways.  Ebola virus takes advantage of a non-specific engulfing process called macropinocytosis, which allows the virus to be “eaten” by a wave-like motion of the cell membrane (Figure 1) [2].</u></em>

<em><u></u></em>

<em><u></u></em>

Explanation:

5 0
3 years ago
While wading in the ocean, you look down into the water and notice an umbrella-shaped, translucent animal. It swims by pulsing i
PolarNik [594]

Answer:

cnidaria

Explanation:

the group contains jellyfish which fit that exact description tentacles that sting you with a burning sensation if your skin comes in contact with them

6 0
3 years ago
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