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TLS Online TPP Program

#Question id: 10568

Turgid cell dropped into sucrose solution , the cell has Yp = 0.488 MPa Ys = –0.732 MPa Yw = –0.244 Mpa , 0.3 M Sucrose solution contain Yp = 0 MPa Ys = –0.732 MPa Yw = –0.732 Mpa , Choose the correct option

#Unit 6. System Physiology – Plant
  1. Water particles move out of the cell, Cell membrane Shrinks and detaches from the cell wall
  2. Water particles move into the cell, cell wall counteracts osmotic pressure  to prevent swelling and lysis
  3. No net movement of water particles , Cell membrane is attached to cell wall
  4. A solution that has the same solute concentration as another solution
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TLS Online TPP Program

#Question id: 12760

#Unit 10. Ecological Principles

Which of the examples below provides appropriate abiotic and biotic factors that might determine the distribution of the species in question?
TLS Online TPP Program

#Question id: 12956

#Unit 10. Ecological Principles

For  nearly 200  years, biogeographers have  noted that  the  tropics  have  more terrestrial species than  temperate regions. Which of the following is NOT a plausible explanation for this pattern?
TLS Online TPP Program

#Question id: 12957

#Unit 10. Ecological Principles

Dichlorodiphenyltrichloroethane is related to the phenomenon of:
TLS Online TPP Program

#Question id: 12959

#Unit 10. Ecological Principles

Ozone layer depletion, since the 1970s, is primarily
TLS Online TPP Program

#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.

Fitness is a measure of the reproductive success of a particular genotype. The highest fitness is 1.00.
Which of the following is most likely correct concerning the gene for resistance to warfarin? 
TLS Online TPP Program

#Question id: 12958

#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.

The strong dependence of RR individuals on large quantities of vitamin K probably is responsible for