#Question id: 13143
#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: 15525
#Unit 4. Cell Communication and Cell Signaling
#Question id: 31
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following is the pair of enantiomers from the following substance?
#Question id: 26339
#Unit 2. Cellular Organization
According to fourth parity rule proposed by Erwin Chargaff which of the following statement are most appropriate
#Question id: 5446
#Unit 8. Inheritance Biology
In a plant, height is control by three quantitative trait loci. Each dominant additive allele is contributing 5 cm height in plant. Maximum expected plant height is 50 cm. What is minimum expected height?