What is the inclusive fitness theory of how altruism evolved?
1.The benefit of living in groups outweighed the disadvantages for altruistic species.
2.Altruism was selected for when it increased the reproductive success of the closest relatives.
3.Species with a high rate of infertility tended to evolve altruism to help increase reproductive success.
4.Altruism evolved to help diversify the genetic pool of a social animal group.
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In which phase of sewage treatment are trickling filters sometimes used?
A. primary treatment. B. secondary treatment. C. tertiary treatment. D. quaternary treatment.
A woman with normal blood clotting mates with a man who also has normal blood clotting. Their first
child is a boy who has hemophilia. Tests show that the child's hemophilia is X-linked and that he has normal genetic inheritance. You can predict that if the couple produces more children together, then the odds are that
a. all of the children will have hemophilia. b. half of the boys and none of the girls will have hemophilia. c. none of the rest of children should have hemophilia. d. all of the boys and half of the girls will have hemophilia. e. half of the boys and half of the girls will have hemophilia.
This image depicts
1.positive feedback loops regulating the release of male.
2.female reproductive hormones.
3.negative feedback loops regulating the release of male reproductive hormones.
4.regulation of the release of female reproductive hormones.
When water moves from soil into the vascular tissues inside the root, it can take three possible pathways. Of these, the apoplastic route is _____.
a. through plasmodesmata b. through aquaporins on the plasma membrane c. between cells and through cell walls d. by active diffusion across the plasma membrane