For a fish, what circumstances necessitate drinking water?
a. all of the choices
b. solute concentration of body greater than surroundings
c. solute concentration of body less than surroundings
d. solute concentration of body equal to surroundings
c
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Unlike in animal meiosis, meiosis in plants gives rise to ____
a. diploid spores b. haploid spores c. diploid gametes d. haploid gametes e. cells without walls
Which statement best sums up our understanding of how animals navigate during migration?
A. The mechanisms have been worked out in great detail, from the genes involved, to the brain structures, to the resulting behavior. B. We have a thorough understanding of orientation but not navigation. C. We have some understanding of the information different animals rely on (sun, stars, or magnetic fields), and some sensory structures, but beyond that the mechanisms are still mysterious. D. Animal navigation is a complete mystery.
Based on the theory of evolution, why should you always finish your bottle of antibiotics?
A) Because the pills are expensive and you should not waste them. B) Because if you don't take all the pills, the bacteria will gain strength and be able to resist future attacks with antibiotics. C) Bacteria vary in their ability to be killed by antibiotics. If you only take some of pills, the bacteria will know that they need to evolve to be stronger for the infection. D) Individual bacteria vary in their ability to be killed by antibiotics. If you don't finish all your pills, you are selecting for the most resistant bacteria.
Steroid hormones _________.
a. bind to a receptor inside the target cell b. are made from cholesterol c. cause the cell to make new proteins d. all of these