The barrier between the intracellular and extracellular fluid compartments in an animal or plant is the:
A. walls of capillaries.
B. membrane of the endoplasmic reticulum.
C. plasma membrane.
D. nuclear membrane.
E. membrane of the Golgi apparatus.
Answer: C
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Convergent evolution
A. explains the morphological similarity yet major genetic differences found between slime molds and fungi. B. refers to two different organisms that develop similar characteristics in adaptation to similar environments. C. explains the structure of lichens. D. refers to the one organism dividing into two. E. explains the morphological similarity yet major genetic differences found between slime molds and fungi AND refers to two different organisms that develop similar characteristics in adaptation to similar environments.
Antimicrobials that kill microorganisms have the suffix
A. -cidal. B. -static. C. -anti. D. -genic.
Most of today's animal phyla appear in the fossil record within a short span of 25 million years beginning about 530 MYA. When researchers analyzed the DNA evidence that might relate sponges to the modern phyla, what unexpected result did they find?
A. Many development genes thought to be specific to eumetazoans were found in sponges. B. The entire genome of sponges was found to be very different in gene diversity from the genomes of other phyla. C. Samples of the living sponge Oscarella carmela were found to be relatively unchanged from fossil sponge DNA samples. D. Most of the developmental genes found in eumetazoans are absent in the sponge Oscarella carmela. E. All of the answer choices are correct.
Which of these behaviors is NOT associated with androgens?
A) body-slamming elephant seals B) mating songs in frogs C) territorial battles in fish D) maturation of ovaries in bears