If a new species is produced by the interbreeding of two members of distinct species, this would be ________ speciation achieved via ________.
A. allopatric; allopolyploidy
B. sympatric; allopolyploidy
C. sympatric; divergence
D. sympatric; autopolyploidy
E. allopatric; autopolyploidy
Answer: B
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If fertilization does not occur following release of the egg by the ovary, then which one of the following degenerates approximately two weeks after ovulation?
A) primary oocyte B) oviduct C) endometrium layer D) corpus luteum E) choices A through D are correct
The presence of antibodies in a newborn baby is most often due to
A. immunity developed after birth. B. natural immunity developed in the baby before birth. C. antibodies are inherited from the father. D. exposure of the baby to antigens after birth. E. antibodies that crossed the placenta from the mother's blood.
Punctuated equilibrium proposed by Eldredge and Gould in 1972 is an evolutionary process that involves
A. "spurts" of change observable in the fossil record with very little if any stasis. B. gradual change observable in the fossil record followed by periods of no change at all. C. gradual change observable in the fossil record with very little, if any, stasis. D. "spurts" of change observable in the fossil record followed by periods of stasis. E. gradual change observable in the fossil record followed by periods of stasis.
It is 6:00 PM and the sun is due west of the hive. A honeybee has just returned to its hive from a patch of flowers that are due north of the hive. Which of the following best describes the type of waggle dance that this bee should perform? Note: The waggle run is the straight part of the dance.
A. The waggle run should be 90° to the right of the vertical axis. B. The waggle run should be 90° to the left of the vertical axis. C. The waggle run should be 45° to the right of the vertical axis. D. The waggle run should be straight up the vertical axis. E. The waggle run should be straight down the vertical axis.