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alina1380 [7]
3 years ago
10

Are viruses alive? This question is debated among scientists throughout the world. Consider the following passage. Scientific re

searchers discovered agents that behaved like bacteria causing diseases such as rabies and hoof-and-mouth, but were much smaller. At this time it became the general view that viruses were biologically "alive." This perception changed in 1935 when the tobacco mosaic virus was crystallized and scientists demonstrated that the particles lacked any mechanisms necessary for metabolic function. It was determined that viruses consisted of a nucleic acid, DNA or RNA, surrounded by a protein shell and the scientific view changed: viruses are complex biochemical mechanisms but not alive.
According to the passage, the MOST IMPORTANT evidence supporting the opinion that viruses are not alive is that they
A) cause disease.
B) contain DNA or RNA.
C) are much smaller than bacteria.
D) do not have a cellular structure.
Biology
2 answers:
jek_recluse [69]3 years ago
6 0

Answer:

I believe the answer is D.

Explanation:

Yep

frosja888 [35]3 years ago
5 0

Answer: The answer is C/are not cellular

Explanation: Viruses are not cellular. They are referred to as a particle twice in the passage.

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[Yes, I meant to put in Geography, not biology. Please Answer QUICK and CORRECTLY; Will mark Brainilest]
zvonat [6]

Answer:

A

Explanation:

This showed that at one point all continents were joined

4 0
3 years ago
Difference between osmosis, diffusion and plasmolysis
pickupchik [31]
Osmosis is the movement of water particles from an area of high concentration of water particles to an area of low concentration of water particles across a semi permeable membrane

Diffusion is the movement of particles from an area of high concentration of particles to an area of low concentration of particles across a partially permeable membrane

Plasmolysis is the shrinking of the cytoplasm if a plant cell in response to diffusion of water out of the cell and into a high salt concentration solution as the cell membrane would pull away from the cell wall

Hope this helped
7 0
3 years ago
Help plz :) <br> dyshujdheyudiokdmfj
Anna35 [415]

Answer: 30 years

Explanation: what is 30 plus 30... 60 it says he died in 1930 and discoverd the thing in 1960  add 30 boom its been 30 years

8 0
3 years ago
Which of the following are chemoreceptors? hair cells in the cochlea receptors in the aortic and carotid bodies baroreceptors in
Mrac [35]

Answer:

The receptors in the aortic and carotid bodies are chemoreceptors.

Explanation:

Chemoreceptors are specialized cells that are responsible for detecting and converting chemical signals into biological signals, to relay that information to the brain, where they will finally be interpreted. Among them we find the peripheral chemoreceptors, which are the aortic bodies, located along the wall of the aortic arch and innervated by the vagus nerve, and the carotid bodies, located in the neck. . Carotid bodies are stimulated by variations in the concentration of oxygen and carbon dioxide in the blood, as well as variations in blood pH. When the pH decreases the CO2 increases and the oxygen decreases, they activate the chemoreceptors to increase breathing.

4 0
4 years ago
Which of the following best describes how the size and shape of a cell affect its ability to obtain nutrients from its surroundi
fredd [130]

Answer:

A smaller cell has fewer organelles dependent upon nutrient uptake and will acquire them more quickly.

Explanation:

the larger the cell the more distance matter must travel within the cell. if the cell was larger there would be a waste of space in the cell and it would take longer for proteins and enzymes to travel about the cell.

5 0
3 years ago
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