GATE (Graduate Aptitude Test in Engineering) Ecology: Questions 1 - 2 of 45

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Question 1

Parenting Behaviour Competition

Appeared in Year: 2019

Question

MCQ▾

Many bird species show cooperative breeding. Offspring are cared for by parents and other individuals (helpers) who are typically offspring from previous years. Which of the following is NOT an appropriate evolutionary explanation for why helpers do not leave and breed on their own?

Choices

Choice (4)Response

a.

At high population density new breeding territories are difficult to obtain and helpers gain more from staying and helping than from dispersing to breed

b.

In environments where resources are scarce, helpers gain more by suppressing their reproduction and minimizing population extinction than from dispersing to breed

c.

When complex parental care is required for offspring survival; helpers gain more by staying and learning to care than from dispersing to breed

d.

When predation risk during dispersal is high, helpers gain more by staying and helping than from dispersing to breed

Question 2

Levels of Selection

Appeared in Year: 2019

Question

MCQ▾

Garter snakes have evolved resistance to the poisonous secretions of the rough-skinned newts. The following figure describes poison production in newts and the resistance (measured as amount of poison tolerated) in garter snakes in three different geographical areas. Given this information, which of the following statements is correct regarding the evolution of poison resistance in garter snakes?

Poison Produced or Tolerated

Choices

Choice (4)Response

a.

Snakes in Area 2 are more adapted than the others

b.

Snakes in Area 3 are less adapted than the others

c.

Evolution of resistance is neutral

d.

The resistance mechanism is costly

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