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TLS Online TPP Program

#Question id: 12343

Hybrids between some related species of plants are sterile because the parent plants had different chromosome numbers. Occasionally the chromosome number of such a hybrid  plant doubles spontaneously. Which of the following best describes the descendants of those plants with the double chromosome number?

#Section 1: Ecology
  1. The plant with the double chromosome number would be genetically defective and have no descendants. 
  2. The descendants would be at a selective advantage because of the increased ability to introgress.
  3. The descendants would be reproductively successful because they could backcross with the parental species.
  4. The descendants would regain the ability to reproduce sexually because chromosomes could pair normally.
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TLS Online TPP Program

#Question id: 10239

#Section 1: Ecology

Two species of barnacle, balanus balanoides and Chthamalus stellatus, occur in the intertidal regions of Scotland. As following

 Which of the following statements is correct?
TLS Online TPP Program

#Question id: 10240

#Section 1: Ecology

A consequence of resource partitioning
TLS Online TPP Program

#Question id: 10241

#Section 1: Ecology

In an Asian rice paddy, carp eat decaying material from around the base of rice plants while a snail scrapes algae from the leaves, stems, and roots of the same plant. They can survive at the same time in the same rice paddy because they
TLS Online TPP Program

#Question id: 10242

#Section 1: Ecology

Ecologist Robert Macarthur observed that five species of similar warblers coexisted on spruce trees because they
TLS Online TPP Program

#Question id: 10243

#Section 1: Ecology

A group of species that potentially compete with one other for a resource, such as insect- eating birds, is called a
TLS Online TPP Program

#Question id: 10244

#Section 1: Ecology

Ecological niche modelling is used to predict the distributions of species. As a general rule, which of the following statements is true?