B cells and T cells that react with self-antigens are destroyed by____

a. apoptosis
b. phagocytosis
c. cytokinesis
d. diakinesis
e. endocytosis


ANSWER: a

Biology & Microbiology

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In the process of alternation of generations, the _____

A) sporophyte is haploid and produces gametes B) sporophyte is diploid and produces spores C) gametophyte is haploid and produces spores D) gametophyte is diploid and produces gametes E) spores unite to form a zygote

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Cancer is caused by rapid cell division that results in tumor formation. Cancer cells often have

mutations in CDK genes. Explain how a mutation in a CDK might help lead to uncontrolled cell growth.

What will be an ideal response?

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Brown algae lack true roots but have similar structures called ____ that anchor them to their substrate

a. stipes b. blades c. holdfasts d. thalli e. rhizoids

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________ proteins stabilize the arrangement of the chlorophyll within a photosystem and modify the absorption spectra of specific chlorophyll molecules

Fill in the blank with correct word.

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