Birds and mammals share which characteristic?
a. ectothermy
b. air pocketed bones
c. bladders
d. four-chambered heart
e. three-chambered heart
ANSWER: d
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Two frog populations (same species) living in two neighboring lakes sing slightly different courtship songs. Increased irrigation makes the land between the two lakes wetter, allowing frogs to expand their ranges to the area between the lakes
Females in both populations prefer loud frogs to quieter frogs, but do not distinguish between the two slightly different songs. Assuming that courtship song differences have a genetic basis, predict what will likely happen to the songs of the two frog populations. A) The songs will become more similar to each other. B) Males will become louder. C) Disruptive selection will cause the songs to differentiate even more. D) Genetic drift will cause the songs to differentiate even more. E) You cannot predict a change in the courtship songs at the two lakes.
Which of the following occurs immediately after a haploid spore germinates?
a. A gametophyte is created by mitosis. b. A gametophyte is created by meiosis. c. A sporophyte is created by mitosis. d. A sporophyte is created by meiosis.
In order to dislodge food that has accidentally entered the trachea, which procedure is used?
a. the Ortolani maneuver. b. the Herbert maneuver. c. the Heimlich maneuver. d. the Bartholin maneuver. e. the Feingold maneuver.
Which statement makes a prediction for the hypothesis "bird species have decreased in number in a particular wetland due to construction traffic"?
A) If a wetland area is disturbed by construction vehicles, then the number of bird species will decrease. B) If construction vehicles are in a wetland, then the birds will become too frightened to reproduce. C) If bird numbers decrease in a wetland, then construction vehicles must have polluted the environment. D) If construction vehicles enter a wetland, then new predators will arrive and reduce the bird populations.