Doctors do not administer vaccinations to people who are too sick. which best explains why?
a. the weakened or dead form of the pathogen may not have any effect on sick people.
b. the weakened or dead form of the pathogen may have a fatal effect when it is combined with medication that the sick people are taking.
c. the digestive systems of sick people may be negatively affected by the weakened or dead pathogen.
d. the white blood cells of sick people may not be able to efficiently handle the weakened or dead form of the pathogen.

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.

High blood pressure occurs when there is too much blood flowing through the blood vessels at one time. by changing the amount of water in the blood, blood pressure can change. the excretory system can to lower blood pressure.which would most likely occur in the kidney? a)more water would be transferred from the nephron.b)less water would be absorbed into the nephron.c)the amount of water in the bladder would decrease.d)the amount of water in the blood would increase.

Based on the data in the graphs do you think pepsin and trypsin are found in the same part of the body? explain your answer.