Which of the following are advantages to Tubifex
worms living in low oxygen environments?
a. fewer predators
b. no limit to their size
c. more reproductive possibilities
d. increased asexual reproduction
e. none of these
Answer: a
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A phylogenetic tree is actually a ____________ that depicts the evolutionary relationships among species.
A. drawing B. hypothesis C. theory D. paraphylogy E. monophylogy
Data from what source led to the hypothesized relationship between the Craniata and nonvertebrate chordates?
A. the vertebrae. B. DNA. C. rRNA. D. external features.
Another term for vegetative reproduction is
a. alternation of generations. b. asexual reproduction. c. fertilization. d. sexual reproduction
Operons ___________________________
(a) are commonly found in eukaryotic cells. (b) are transcribed by RNA polymerase II. (c) contain a cluster of genes transcribed as a single mRNA. (d) can only be regulated by gene activator proteins.