Large ears is a rare trait in a mainland population of mice. A female mice homozygous for very large ears arrives at an island that already contains mice after sneaking onto a boat. This will lead to a population with a higher incidence of big ears than the mainland population because of ____
A. increased mutation.
B. a bottleneck effect.
C. genetic drift.
D. natural selection.
E. gene flow.
E. gene flow.
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The postindustrial age is defined by ____
a. high birth and death rates b. zero population growth c. dramatic slowing in population growth d. declining death rate e. declining birth rate
In horses, there are four alleles at the A locus
Arranged in dominance sequence they are:A (wild), ab (bay), ac (brown), ad (black) If you bred several bay mares whose sires were brown to a brown stallion whose sire was black, what are the genotypes of the parents; what type of offspring would be produced, and in what proportion? What will be an ideal response?
You are a naturalist traveling with a group of explorers in a valley of the Amazon rainforest. In a particularly wet area, you see a beautiful carpet of small plants. You notice tiny flowers on most of the plants. To which group do these plants belong?
A) angiosperms B) gymnosperms C) mosses D) hornworts E) seedless vascular plants
Since O2/H2O is the most electropositive couple, ________ energy is available from ________ than from ________
a. more / fermentation / aerobic respiration b. more / aerobic respiration / anaerobic respiration c. less / anaerobic respiration / aerobic respiration d. less / aerobic respiration / fermentation