Answer:
The correct answer is "The "host range" for a virus is determined by the presence or absence of particular components on the surface of a host cell that are required for the virus to attach".
Explanation:
The missing option of this question is the one that is correct, which is "The "host range" for a virus is determined by the presence or absence of particular components on the surface of a host cell that are required for the virus to attach". A virus is able to infect by recognizing particular components that are present in the surface of the host cell. If this components are absent in the cell, the virus is not able to infect it. Therefore, the "host range" is determined by the presence or absence of this particular components.
The excessive use of water for irrigation in dry climates, with heavy soils, causes salt accumulation because they are not washed out by rainfall. The practice of waterlogging without adequate drainage has also become a serious cause of soil salinization .
A heterotroph is a animal who can't fix carbon and uses organic carbon for growth.
Uganda!!! This is the answer
Below are supposed to be the choices:
A. water flows in a lake or pond but never flows in a wetland.
<span>B. Wetlands are nesting areas for birds, but lakes and ponds are not. </span>
<span>C. Water does not always cover a wetland as it does a lake or pond. </span>
<span>D. Wetlands are salty, but lakes and ponds are fresh.
</span>
The answer is C. Hope it helps.
