Tortoises colonizing the different Galàpagos islands and evolving into different species is an example of speciation.
A. postzygotic
B. sympatric
C. prezygotic
D. allopatric
E. parapatric
D. allopatric
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Edge effects are the result of which of the following?
A. Populations of flora and fauna have emigrated from the core of their population center to the edge of their habitat. B. Metapopulations of some of the larger fauna have become more dominant on the landscape and as a result have increased the edge of their habitat. C. Habitat fragmentation or habitat shrinkage has occurred, and thus the edge of the habitat has increased in relative proportion. D. Habitat fragmentation or habitat shrinkage has occurred, and thus the edge of the habitat has decreased in relative proportion. E. Populations of particular species have decreased and are on the edge of extinction.
To dissect means primarily
(a) to cut open. (b) to remove all internal organs. (c) to expose to view. (d) all of the above.
In a medical emergency, when an individual has stopped breathing on their own, mouth-to-mouth resuscitation can be administered while waiting for the arrival of EMTs, in order to increase that individual’s odds of survival. In order to perform mouth-to-mouth resuscitation, air from a conscious individual’s lungs is forced into the lungs of the unconscious individual. What effect does this have?
a. Forcing air into the unconscious individual’s lungs triggers the sympathetic breathing reflex, whereby the lungs ”remember” to start breathing again. b. Mouth-to-mouth resuscitation prevents the unconscious individual from exhaling their residual volume, which would cause the lungs to collapse and lead to inevitable death. c. Some residual oxygen from the conscious individual’s lungs diffuses into the unconscious individual’s blood, and the increased pressure forces some CO2 saturated air out of their lungs. d. Mouth-to-mouth resuscitation keeps the alveoli of the lungs moist and warm, allowing the lungs to continue exchanging gases with the atmosphere on a passive but adequate level.
Many insects do not see into the red color-range and as a result, many insect-pollinated flowers are colors other than red (e.g., purple and yellow). This flower coloration would be considered a(n)
a. natural selection. b. evolution. c. adaptation. d. gene.