Which of the following correctly describes the interactions between antigens, class II MHC molecules and T cells?

A) Antigens bound to class II MHC molecules and interact with helper T cells
B) Antigens bound to class II MHC molecules and interact with killer T cells
C) both a and b
D) neither a nor b


A

Environmental & Atmospheric Sciences

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The most important reason why summers in the Southern Hemisphere are not warmer than summers in the Northern Hemisphere is that

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Environmental & Atmospheric Sciences

Read carefully through the following sentence and decide which of the options is correct: In

industrialized countries, personal perspectives of environmental issues are realistic because environmental problems develop close to home as resources are collected and used locally. a. The word "realistic" should be replaced by "warped." b. The word "industrialized" should be replaced by "developing." c. The word "resources" should be replaced by "wastes." d. The word "environmental" should be replaced by "geological." e. The word "home" should be replaced by "rivers."

Environmental & Atmospheric Sciences

The group of marine mammals that are named because of their fanciful resemblance to mermaids is order Carnivora

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Quartz forms at a lower temperature than olivine

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences