The first haploid structure in the life cycle of a
plant is the
a. zygote.
b. gamete.
c. gametophyte.
d. spore.
e. sporophyte
D
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With capture-recapture, the recaptured animals might not represent the population correctly because ________
a. they might return to traps preferentially b. they might avoid traps having been caught once c. all of the choices d. some animals may have lost their tags
There is a test for the presence of Huntington's allele in symptomless individuals. Would you recommend that Andrew have himself tested?
a. Yes b. No
As part of your research project, you travel to an island to learn more about the habitats and relationships of flies, spiders, and centipedes. You and your assistant plot out five different areas on the island and count the numbers of flies, spiders, and centipedes living in each plot. Your results show the following: Plot Flies Spiders Centipedes1300254242617103147152147397805791393The hypothesis that closely matches the data provided is:
A. herbivorous insects survive best on islands where spiders and centipedes live. B. herbivorous insects and spider populations are decreased by centipedes. C. herbivorous insects feed on spiders and centipedes. D. spiders are the top predators on all islands.
What is the main way that marine teleost fishes deal with the osmotic stress of living in seawater?
a. by active transport of ions out of the body by chloride cells b. by excreting nitrogenous wastes through their kidneys as urea c. by excreting excess salt through the actions of specialized salt glands in their heads d. by active transport of ions into the body through the gills