What is the ploidy of an organism that is 7n, where n = 5?
A) 5
B) 7
C) 12
D) 35
E) 57
B) 7
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An organism at the top of the food chain:
A. has no natural prey B. has no, or very few, natural predators C. experiences no selection pressures D. is not subject to evolutionary changes
Two tRNA molecules occupy the P and A sites in a ribosome. The amino acids they carry are joined
by a peptide bond. What is the very next event that occurs? A. The tRNA in the P site detaches and leaves the ribosome. B. A third tRNA enters the ribosome. C. The ribosome moves one codon down the mRNA. D. The large subunit leaves the ribosome. E. A new amino acid is joined to the tRNA in the P site.
Which type of effect has an increasing impact as the population size increases?
a. density-independent b. density-dependent c. mortality d. survivorship e. Coriolis
You are a paleontologist trying to find fossils that represent intermediate forms in an evolutionary transition. Which of the following pieces of information could help you identify a geological formation for your search?
a. Based on the fossil record the evolutionary transition must have taken place 210 to 230 million years ago. b. Transitional fossils likely had long spines. c. The organisms' hard shells would have made fossilization likely. d. The transition is predicted to have taken place in shallow inland seas. e. A and D.