Practice Questions

TLS Online TPP Program

#Question id: 4711

Starting from the wild mustard Brassica oleracea, breeders have created the strains known as Brussels sprouts, broccoli, kale, and cabbage. Therefore, which of the following statements is correct?

#Unit 11. Evolution and Behavior

In this wild mustard, there is enough heritable variation to permit these different varieties.
Heritable variation is low in wild mustard—otherwise this wild strain would have different characteristics.
Natural selection is rare in wild populations of wild mustard.
In wild mustard, most of the variation is due to differences in soil or other aspects of the environment.

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TLS Online TPP Program

#Question id: 10716

#Unit 10. Ecological Principles

The stability of a food web in a community is quantified using certain parameters which are defined below. Which of the following is an CORRECT representation?

A. Community with more complex is more stable

B. Community with more number of alternate is more stable

C. Stability of community is inversely proportional to Connectance

D. Community with higher value of dominax index is more stable

TLS Online TPP Program

#Question id: 10719

#Unit 10. Ecological Principles

Five Hypotheses Explain How Species Richness Affects Community Services, Following statement are given

A) Community services decline with decreased species richness in a stepwise fashion.

B) Species that play the same roles in a community can compensate for each other if some are lost under particular conditions

C) Species richness declines even slightly from its natural levels, community services are reduced immediately

D) Community services change as the number of species increases or decreases, but that the direction of change is not predictable.