Suppose that you encounter an antigen for the first time. What types of cells stored in your lymph nodes can be activated in case you encounter the antigen again?
A) memory cells
B) effector cells
C) phagocytic cells
D) helper T cells
A
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In a two-point cross to map genes A and B, you obtained 98 recombinant types and 902 parental types among the offspring. How far apart are these genes?
A. 9.8 cM B. 0.98 cM C. 90.2 cM D. 9.02 cM E. .098 cM Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about two-point mapping? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Tetanus antitoxin can cross the placenta
Indicate whether this statement is TRUE or FALSE.
Solar radiation that falls on high latitudes ____
a. passes through about the same amount of atmosphere as that which falls at low latitudes b. passes through less atmosphere than that which falls at low latitudes c. passes through more atmosphere than that which falls near low latitudes d. is spread out over less area than that which falls near low latitudes e. covers about the same area as that which falls near low latitudes
The Lotka-Volterra models used for competition may also be used to describe the dynamics of a mutualism by replacing the competition coefficients with positive interaction coefficients
Indicate whether the statement is true or false