#Question id: 4768
#Unit 8. Inheritance Biology
A trait that appears to be dominant in one sex but recessive in the other is called:
#Question id: 28201
#Unit 5. Developmental Biology
Which of the following is correct about Instructive interaction?
#Question id: 12960
#Unit 10. Ecological Principles
The Norway rat (Rattus Norvegicus), a widespread pest, was controlled for about a decade by the anticoagulant warfarin. This chemical substance, placed in food pellets, is absorbed by the intestinal tract and inhibits the clotting of blood. After a population decline for about 10 years, rat populations increased and stabilized. In one European population, as illustrated in the graph below, the percentage of rats resistant to warfarin has remained fairly stable over a number of years.
Resistance to warfarin is governed by a dominant autosomal gene, R. More than 15 percent of the resistant animals are heterozygous at this locus (Rr). The table below indicates the response to warfarin and relative reproductive fitness of individuals that are homozygous or heterozygous for the dominant gene (R). The RR individuals have a 20-fold increase in vitamin K requirement over individuals.
#Question id: 26946
#Unit 10. Ecological Principles
Calculate the finite rate of increase, if ecologists count the number of insects in the population, N0=200, the next year ecologists count 260 insects in the same population?
#Question id: 11734
#Unit 6. System Physiology – Plant
Some molecules act as cytokinin antagonists, which are able to block the action of cytokinins that is