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777dan777 [17]
2 years ago
5

Describe the Endosymbiotic theory

Biology
1 answer:
lidiya [134]2 years ago
8 0

Answer: The Endosymbiotic Theory states that the mitochondria and chloroplast in eukaryotic cells were once aerobic bacteria (prokaryote) that were ingested by a large anaerobic bacteria (prokaryote). This theory explains the origin of eukaryotic cells.

Explanation: Hope this helps ;)

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Describe the possible long term effects of HIV on the immune system​
dangina [55]

Explanation:

HIV attacks a specific type of immune system cell in the body. It's known as the CD4 helper cell or T cell. When HIV destroys this cell, it becomes harder for the body to fight off other infections. When HIV is left untreated, even a minor infection such as a cold can be much more severe.

6 0
3 years ago
Human activity, such as the burning of coal and oil, refining petroleum in factories has impacted which of the following
Zarrin [17]

Answer:

carbon cycle

Explanation:

Carbon is an essential element in the bodies of living organisms. It is also economically important to modern humans, in the form of fossil fuels.

Carbon dioxide—\text {CO}_2CO  

2

​  

start text, C, O, end text, start subscript, 2, end subscript—from the atmosphere is taken up by photosynthetic organisms and used to make organic molecules, which travel through food chains. In the end, the carbon atoms are released as \text {CO}_2CO  

2

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start text, C, O, end text, start subscript, 2, end subscript in respiration.

Slow geological processes, including the formation of sedimentary rock and fossil fuels, contribute to the carbon cycle over long timescales.

Some human activities, such as burning of fossil fuels and deforestation, increase atmospheric \text{CO}_2CO  

2

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start text, C, O, end text, start subscript, 2, end subscript and affect Earth's climate and oceans.

4 0
3 years ago
Read 2 more answers
After suffering a head injury, doctors discover that your
VikaD [51]

Answer:

1. You will be unable to smell

3. Your olfactory receptor cells will no longer be able to respond  to molecules trapped in the mucus.

Explanation:

The Olfactory receptors are the receptors present in the olfactory neurons which detect different odorants or smell.

The olfactory receptors are embedded in the epithelium or mucous lining of the nose in which one extension of the cell body reaches the epithelium surface and branches into cilia like structures which sense the odour.

If the axons of the olfactory cells are broken then the cells will not be able to respond to the molecules trapped in the mucus and thus no detection of odour. The signal will not be generated in response and thus will not be sent to the brain. Thus, the person will not be able to smell.

Thus, Options-1 and 3 are correct.

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3 years ago
I WILL GIVE BRAINLIST
andrey2020 [161]

Answer:

The answer is B

Best of luck to you!

4 0
3 years ago
What is the allele frequency?
Genrish500 [490]

Answer:

Allele frequency is a measure of the relative frequency of an allele on a genetic locus in a population. Usually it is expressed as a proportion or a percentage. In population genetics, allele frequencies show the genetic diversity of a species population or equivalently the richness of its gene pool.

5 0
3 years ago
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