Molecular evidence points to __________ as an
explanation for the great diversity of hormones and
hormone receptors in vertebrates.
a. polyploidy and nondisjunction
b. gene duplications followed by mutations
c. continental drift
d. chromosomal translocations
e. homeotic genes
Answer: b
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Which of the following phrases INCORRECTLY completes the following statement? The Hox complexes of vertebrates
A. encode the same genes as those found in the Antennedepia and bithorax complexes. B. follow the colinearity rule. C. are arranged in groups of four complexes in all organisms that possess them. D. determine the anteroposterior axis. E. suggest there is a basic body plan that is followed by all multicellular organisms.
What vital element missing from the atmosphere affected the type of life cells first formed on Earth?
a. Ammonia b. Carbon dioxide c. Oxygen d. Nitrogen
Luke went to a pediatrician when he was 6 months old. The pediatrician consulted a graph and concluded that Luke was in the 97th percentile for height, weight and length. The pediatrician predicted that Luke would be tall when he reached adulthood.What type of reasoning did the pediatrician use to generate her prediction about Luke's future growth in height?
A. reductionism B. inductive reasoning C. applied theory D. deductive reasoning
Imagine that a mutation occurs such that an insect lacks functional malpighian tubules. Predict the consequences for this creature.
A. There would be no consequences, as malphigian tubules are characteristic of earthworms, not insects. B. The ability to filter waste would be severely impaired. C. The ability to maintain water and salt balance in the body would be severely impaired. D. The ability to secrete waste would be severely impaired.