In a urine test, what may indicate damaged kidneys?
a. urine high in proteins
b. high sugar content
c. acidic urine
d. alkaline urine
e. chemicals present in urine
a
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Males find females via airborne pheromones when they are close to the web. Their front legs
have many __________ to detect these pheromones
a. chemoreceptors b. rods and cones c. interneurons d. thermosensors
How successful is the technique of cloning adult mammals by implanting DNA into donor eggs?
a. Few embryos survive until birth, and of those that do, many have serious health problems. b. About half of the embryos survive until birth, but many of these die before adulthood. c. Of the embryos that survive until birth, health outcomes are predictable. d. Most embryos survive, but are not able to reproduce as adults. e. Most embryos survive and lead healthy adult lives.
In cocker spaniels, black coat color (B) is dominant
over red (b), and solid color (S) is dominant over spotted (s). If two dihybrids (Bb Ss) are crossed, what fraction of the black, solid offspring will be homozygous? a. 4/16 b. 9/16 c. 1/9 d. 3/16 e. 3/4
Which one of the following is an important evolution concept that helps prevent organisms from mating across species boundaries?
a. hybrid formation b. postmating isolating mechanisms c. geographic isolation d. natural selection