Most human cancers originate in which type of tissue?
a. neoplastic
b. epithelial
c. connective
d. muscular
e. nerve
b
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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.
tumor suppressor gene
What will be an ideal response?
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.
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.