So its acquired immunity and the cells responsible are the B lymphocytes that produces antibodies against the virus. Memory is keep since first encounter of the virus by the immune system by way of the antibodies that was initially produced. The antibodies are there already, which makes it fast to act upon when expose again.
Answer:
potency
Explanation:
and you can't buy them at a store either
The answer would be : C. Increase the intensity of cardiovascular workouts
cardiovascular workouts are the best one to increase the target heart rate. By increasing it's intensity, Xavier will increase his heart rate to the point where he managed to achieve his target
hope this helps
Answer – Three Trimesters
The development a fetus occurs over three trimesters of pregnancy. The nine months gestational period in humans is divided into three stages of equal length; the first three months form the first trimester, the fourth to sixth months form the second trimester, and the seventh to ninth month form the third trimester.
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Answer:
Explanation:
A representative sample is a subset of a population that seeks to accurately reflect the characteristics of the larger group. For example, a classroom of 30 students with 15 males and 15 females could generate a representative sample that might include six students: three males and three females.
