The answer is C, West Nile virus!
About 1.7 million species have been identified on earth.
Answer:
Cells that respond to peptide hormones usually do so through a sequence of biochemical reactions involving receptor and kinase activation. In order for cells to respond, it is necessary for first and second messengers to communicate. This is possible because <u>C) G protein acts as the link between first and second messengers </u>.
Explanation:
When the first messengers join the receptor, in the external membrane of the cell, it produces a change in the shape of the receptor that causes the join of the G protein to this structure. The G protein joined to the receptor and the first messenger modulates the activity of the second messengers inside the cell.
The correct option is A.
Multiple trial of an experiment normally improve the reliability of the experiment. Repeating an experiment several time using the same procedure usually increase the accuracy of the data obtained. The average of these data can then be calculated to obtain as near accurate result as possible.
Answer:
b. 6CO2 + 6H20 molecules are formed as a result of cellular respiration