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MArishka [77]
3 years ago
13

Why do virus need a host

Biology
2 answers:
Anika [276]3 years ago
6 0
Viruses depend on the host cells that they infect to reproduce. When found outside of host cells, viruses exist as a protein coat or capsid, sometimes enclosed within a membrane. The capsid encloses either DNA or RNA which codes for the virus elements
zzz [600]3 years ago
4 0
So that it can spread out I think
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Explanation:

The salt solution is meant to lower the ice melting point hence keep most of the water from turning into ice even at zero degrees temperatures. The salts are dissolved in the water to form a salty solution that percolates the ground and reach plant roots. Because the salty water is hypertonic (more concentrated) to the cell cytoplasm of the plant roots, water is drawn from the plant by osmosis. This is the reversal of normal plant root absorption of water from the soil. This causes the plant root to wither and subsequently the whole plant to die. Remember in osmosis, water moves from the less concentrated solution to the more concentrated solution through a semipermeable membrane.

Learn More:

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From which hot spot would you view Polaris at an altitude of 45 degrees?
maks197457 [2]

Answer:

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Explanation:

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The altitude of the Pole star or the Polaris when an observer is at the Tropic of Cancer is measured at 23.5 degree. While if the observer sees the Pole star at its zenith, the observer is located at the North Pole. i.e. 90 degree.

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8 0
3 years ago
Based on these images, what can you conclude about the organisms?
Zarrin [17]

Answer:

2)They have similarities in their embryonic stages that don’t exist in their adult forms

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The presence of notocorde is a characteristic characteristic of vertebrates and birds, fish, reptile amphibians and mammals have it since they are embryos to adults

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3 years ago
The energy needs of a human population are not affected by the__.
zimovet [89]
I believe the answer is the location of energy sources
8 0
3 years ago
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