Ecology
A. is primarily involved with studies of individual organisms.
B. is the study of biomes and climate.
C. works for the good of the environment.
D. is the study of plant and animal interactions.
E. is the study of interactions between organisms and their environment.
Answer: E
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Which one of the following statements about the use of synthetic polynucleotides in cracking the genetic code is not true?
A. Poly(A) RNA directs the synthesis of only polylysine in vitro. B. Particular codons are generated in predictable ratios with random RNA polymers containing specific ratios of different nucleotides. C. Three different amino acids are incorporated into peptides when synthetic polymers of only one nucleotide are used to synthesize the RNA polymer. D. The codon table was completed by using RNA polymers of defined sequences.
The substance indicated as “B” is a(n)
a. inhibitor. b. activator. c. substrate. d. coenzyme. e. cofactor.
The three principal organs of seed plants are
A. roots, leaves, and flowers B. stems, leaves and roots C. stems, fruits, and flowers D. roots, stems, and flowers
Why might the different species of whales fail to recover even though hunting has been banned?
A. loss of genetic diversity B. increased disease spread due to edge effects C. loss of habitat D. introduction of invasive species E. increasing predation