Plants generally must use which of the following methods of phosphorus uptake?
A. nonenergy transport
B. transport control by soil moisture
C. passive uptake
D. ATP proton cotransport
E. None of these are true
A. nonenergy transport
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Choose the true statements about the evolution of complex characters, such as powered flight.
_____ Phylogenetic analysis using cladistics can help reveal the sequence leading to the evolution of a complex character. _____ Usually a single mutation in one gene leads to the simultaneous appearance of the complex character. _____ Often the initial stage in the evolution of a complex character was an adaptation to some unrelated selection pressure. _____ The intermediate stages in the evolution of a complex character had no fitness advantage.
The increasing concentration of fat-soluble toxins at successive trophic levels is known as ________.
a. trophic cascade b. biomagnification c. energy flow d. gross primary productivity
The club fungi typically reproduce by producing:a
asci. b. basidia. c. zygospores. d. ascospores. e. mycorrhizae
MOST ocular lenses magnify specimens by a factor of
a) 10x. b) 100x. c) 1,000x. d) 2,000x.