Immature B lymphocytes undergo clonal deletion in the bone marrow.

Answer the following statement true (T) or false (F)


True

Biology & Microbiology

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The seed coat is formed by the hardening of the 

A. ovule. B. integument. C. endosperm. D. embryo. E. prothallus.

Biology & Microbiology

The diameter of a blood vessel will be reduced by the contraction of ________

a. cardiac muscle b. smooth and cardiac muscles c. skeletal and cardiac muscles d. smooth muscle e. skeletal muscle

Biology & Microbiology

The time that it takes for half of a radioactive isotope to change into another stable element is its

A. chemical life cycle. B. half-life. C. activation time. D. life span.

Biology & Microbiology

Adenylyl cyclase has the opposite effect of which of the following?

A) protein kinase B) protein phosphatase C) phosphodiesterase D) phosphorylase

Biology & Microbiology