Based on the plasmodium life cycle shown in figure 21–4, what would happen if the mosquitoes disappeared?
a. plasmodium merozoites would form, but gametes would not form.
b. the plasmodium life cycle would continue, and humans would become the only host.
c. plasmodium infection would continue because it will be passed from person to person.
d. the plasmodium life cycle would be interrupted, and the infection could not be passed on.

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.  

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.