TLS Online TPP Program

#Question id: 3900


In the development of the fly Drosophila, homeotic genes:

#SCPH28 | Zoology
  1. are transcribed during egg production; their mRNAs lie dormant in the egg until it is fertilized.

  2. determine the number of body segments that will form.

  3. are expressed late and determine the detailed structure of each body segment.

  4. generally have no introns.

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TLS Online TPP Program

#Question id: 11418

#SCPH28 | Zoology

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

#SCPH06 I Botany

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: 11419

#SCPH28 | Zoology

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

#SCPH06 I Botany

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?

TLS Online TPP Program

#Question id: 11420

#SCPH28 | Zoology

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?

TLS Online TPP Program

#Question id: 11421

#SCPH28 | Zoology

The strength of the island biogeography model was that it generated several falsifiable predictions

A) The number of species should increase with increasing island size.

B) The number of species should decrease with increasing distance of the island from the mainland

C) The number of species on an island might remain the same, but the composition of the species should not be change

Which of the following above statement are correct?