____ are cells of the adaptive immune system that can activate B cells by binding to MHC class II protein–antigen complexes

Fill in the blank with the appropriate word.


Helper T cells

Biology & Microbiology

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Which one of the following is a symptom of a heart attack?

A) increased cardiac output B) intense chest pain C) normal breathing D) pain in the knees E) pain in the right chest that radiates down the right arm

Biology & Microbiology

The first known member of the genus, Homo,

a. H. erectus.
b. H. sapiens.
c. H. neanderthalensis.
d. H. habilis.
e. H. floresiensis

Biology & Microbiology

In humans, meiosis is a part of

What will be an ideal response?

Biology & Microbiology

Which of the following cannot be estimated using traditional linear regression techniques?

A. log(Y) = ?0 + ?1log(X) + Ui B. Y = ?0 + ?1log(X) + Ui C. log(Y) = ?0 + ?1X + Ui D. None of the answers is correct.

Biology & Microbiology