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TLS Online TPP Program

#Question id: 11162

Which statement represents the best explanation for the observation that the nuclear DNA of wolves and domestic dogs has a very high degree of homology?

#Unit 9. Diversity of Life Forms
  1. Dogs and wolves have very similar morphologies.
  2. Dogs and wolves belong to the same order.
  3. Dogs and wolves are both members of the order Carnivora.
  4. Dogs and wolves shared a common ancestor very recently.
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TLS Online TPP Program

#Question id: 24573

#Unit 10. Ecological Principles

Calculate the finite rate of increase, if ecologists count the number of birds in the population, N0= 100, the next year ecologists count 110 birds in the same population, 
TLS Online TPP Program

#Question id: 24572

#Unit 10. Ecological Principles

Find out the characteristics of geometric growth?
a. It can grow for both periodic and continuous breeders
b. depends on the activity of net reproductive growth rate
c. unlimited Population Growth Leads to J-shaped
d. unlimited Population Growth Leads to S-shaped
e. resources are not limited
TLS Online TPP Program

#Question id: 24571

#Unit 10. Ecological Principles

In which case the population eventually decline to extinction?
TLS Online TPP Program

#Question id: 24570

#Unit 10. Ecological Principles

Geometric growth describes the population growth where is the N0= 100 is the number of females currently in the population,  what is the population size after the five generation if R0= 1.4 ?
TLS Online TPP Program

#Question id: 24569

#Unit 10. Ecological Principles

Geometric and the exponential growth both are describe by 
a. similar mathematical models
b. slightly different mathematical models
c. similar  J-shaped growth curve
d. similar S-shaped growth curve
TLS Online TPP Program

#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.

Fitness is a measure of the reproductive success of a particular genotype. The highest fitness is 1.00.
In a population where warfarin is no longer applied, the expectation is that the