TLS Online TPP Program

#Question id: 1442


Transgenic mice that express an activated oncogene like rasD under the control of the TetOFF system are likely to undergo which of the following events when tetracycline is given?

#Unit 4. Cell Communication and Cell Signaling
  1. growth of tumors

  2. shrinkage of tumors

  3. no effect on tumors

  4. tumors become metastatic

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TLS Online TPP Program

#Question id: 11385

#Unit 10. Ecological Principles

Which of the following biomes is correctly paired with the description of its climate?

A) savanna-low temperature, precipitation uniform during the year

B) tundra-long summers, mild winters

C) Taiga-relatively short growing season, Low precipitation

D) temperate grasslands-relatively warm winters, most rainfall in summer

E) tropical forests-nearly constant day length and temperature

TLS Online TPP Program

#Question id: 11416

#Unit 10. Ecological Principles

Which of the following biomes spans the largest annual mean temperature range, but the narrowest mean precipitation range?

TLS Online TPP Program

#Question id: 11417

#Unit 10. Ecological Principles

Use the following figure to answer the question below


Which of the following name of biome 5, 6, 4 and 3 respectively?

TLS Online TPP Program

#Question id: 11418

#Unit 10. Ecological Principles

Use the following diagram of five islands formed at around the same time near a particular mainland, as well as MacArthur and Wilson's island equilibrium model principles


Which island would likely have the lowest extinction rate?

TLS Online TPP Program

#Question id: 11419

#Unit 10. Ecological Principles

There are more species in tropical areas than in places more distant from the equator. This is probably a result of

a) more predators and parasites

b) more dispersed annual solar radiation compared to the poles

c) more frequent ecological disturbances over a longer time span

d) a longer time frame without disturbances for evolution and speciation

TLS Online TPP Program

#Question id: 11420

#Unit 10. Ecological Principles

We can represent the relationship of species richness to area with the equation


Where S = number of species, and c and z are both constants

Which of the following is not a logical explanation to relationship of species richness to area?