Most human cancers originate in which type of tissue?

a. neoplastic
b. epithelial
c. connective
d. muscular
e. nerve


b

Biology & Microbiology

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tumor suppressor gene

What will be an ideal response?

Biology & Microbiology

Transfer of random pieces of DNA mediated by phage is known as

A. transformation of competent cells. B. generalized transduction. C. conjugation. D. transposition. E. specialized transduction.

Biology & Microbiology

In the photosystem I reaction center, light energy captured by pigment molecules is passed to a special reaction center chlorophyll a called

A. P680. B. retinal. C. chlorophyll II. D. P700. E. chlorophyll I.

Biology & Microbiology

Why is sexual reproduction most likely the ancestral state in eukaryotes?

a. Asexual reproduction is completely absent from basal unicellular eukary-otes. b. Under the parsimony principle, the most common form of a trait's state is always the ancestral state. c. The "twiggy" distribution of obligate asexual reproduction in phylogenetic trees makes it more likely that asexuality is a derived trait. d. Evolutionary models suggest that obligate asexual taxa are more prone to extinction than sexual ones.

Biology & Microbiology