#Question id: 3511
#Section 2: Evolution
What proportional of one round and two wrinkle seed if random selected 3 seed from various seed produced from monohybrid test cross?
#Question id: 10834
#Section 1: Ecology
Which of the following is not an example of symbiosis?
#Question id: 11351
#Section 1: Ecology
Which type of mutualism is demonstrated by plant-pollinator relationships?
#Question id: 11405
#Section 5: Applied Ecology & Evolution
Vulnerability to extinction can be linked to species
following characteristics. Which of the following statement are correct?
A. Endemism species are more prone to extinction than fragmented
B. Species that are capable of migrating between fragments of habitat, such as between mainland areas and islands, may be more resistant to extinction
C. Population variability species are less prone to extinct
D. Species with naturally long life spans may be more likely to become extinct
#Question id: 12960
#Section 5: Applied Ecology & Evolution
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.