Which evolutionary adaptation is found in a typical desert plant?
A) shallow roots to quickly capture water
B) broad leaves to capture the bright sunlight
C) long-blooming flowers to attract pollinators
D) deep roots to capture all available moisture
A
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Why is the most damage to the brains of Huntington disease patients observed in the striatum?
a. The Rhes protein, needed for mutant huntingtin to become toxic, is only produced in the striatum.
b. The huntingtin gene is only expressed in the striatum.
c. The mutant huntingtin protein becomes toxic when bound to the Rhes protein, which is abundant in the
striatum.
d. Only the cells of the striatum contain the huntingtin mutation.
e. The CAG expansions are corrected in regions of the brain other than the striatum
DNA sequences called __________ increase the rate of RNA synthesis after initiation of transcription
a. promoters b. TATA boxes c. UPEs d. enhancers e. regulators
All woody plants are:a
annuals. b. biennials. c. perennials. d. deciduous. e. evergreen
Electron transport takes place in the ________
A) mitochondria B) chloroplasts C) cytoplasm D) ribosomes