Birds are least likely to be attracted to flowers with
a. yellow petals.
b. red petals.
c. both red and yellow parts.
d. strong attractive scents.
e. intense red and yellow patterns on petals.
Answer: d
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Which one of these statements about the hereditary lineage of the Y chromosome is not correct?
A. Ninety-four percent of the Y chromosome consists of sequences in which genetic linkage is complete. B. Because of complete linkage, each hereditary lineage of Y chromosomes is separate from every other lineage. C. Mutations along any given Y chromosome are often lost over time. D. Each unique combination of nucleotides along a Y chromosome constitutes a Ychromosome haplotype. E. Mutations that occur along the Y chromosome are completely linked to any past or future mutations along that chromosome.
Organisms that make their own nutrients by capturing energy from nonliving resources (solar energy) are called
A. detritivores. B. parasites. C. decomposers. D. consumers. E. producers.
Most single gene defects that affect human behavior do so
A. as a primary effect of the gene. B. through their action on the structure, development, or function of the nervous system. C. by affecting muscle metabolism. D. by having only subtle effects on the nervous system. E. by gene action that takes place only in the adult stage of life.
Dyes are often added to growth media to aid in the identification of microbes. What could be the purpose of a dye in this case?
A) to make the plate prettier B) to color key the type of plate being used C) to act as a growth enhancer D) to act as a pH indicator