Practice Questions

TLS Online TPP Program

#Question id: 9214

Researchers have been studying a rare population of 87 voles in an isolated area. Ten voles from a larger population were added to this isolated population. Besides having ten additional animals, what benefits are there to importing individuals?

#Unit 9. Diversity of Life Forms

There is no benefit other than increasing the overall population size.
Additional voles will strengthen competition and increase the survival of the fittest.
Additional animals would increase beneficial genetic drift.
Additional voles from a distant population will likely increase genetic diversity and reduce inbreeding.

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TLS Online TPP Program

#Question id: 26914

#Unit 10. Ecological Principles

Some given statements about anti freezing are given;

a.some invertebrates to withstand temperatures as low as –18°C without freezing, in presence of glycoproteins

b.Sodium, potassium, or chloride ions involve to increasing the blood freezing point, so the lack of these ions some species help to lower the blood freezing point

c.Amphibians release large amount of glucose into the blood to prevent freezing of blood in cold

d.Sodium, potassium or urea function as anti freezing in their blood

e.Glycine causes supercooling in plants

Which of the following statements about supercooling/anti freezing is correct?

TLS Online TPP Program

#Question id: 26915

#Unit 10. Ecological Principles

Cell walls allow plant cells to build up large internal hydrostatic pressures called

TLS Online TPP Program

#Question id: 26916

#Unit 10. Ecological Principles

If a plant has a fresh weight of 150 g, a dry weight of 100g, and a turgid weight of 160g, what is its relative water content?

TLS Online TPP Program

#Question id: 26917

#Unit 10. Ecological Principles

Which of the following is the correct prediction about the relative water content or RWC?

a.RWC is involve to measure of turgidity and water contents of plant cell

b.To estimate RWC, three measurements are needed: fresh weight, turgid weight, and dry weight

c.In drought condition, plant will die if the RWC values is less than 100%

d.RWC values closer to 100% indicate plants are less affected by drought stress

TLS Online TPP Program

#Question id: 26918

#Unit 10. Ecological Principles

A place where the summary of the organism’s tolerances and requirements, referred to as

TLS Online TPP Program

#Question id: 26919

#Unit 10. Ecological Principles

Species cannot coexist permanently in a community, if_____