Ecology And Evolution - (EY) 2018 GATE Paper (Practice Test) - GATE MCQ

A rectangle becomes a square when its length and breadth are reduced by 10 m and 5 m, respectively. During this process, the rectangle loses 650 m2 of area. What is the area of the original rectangle in square meters?

A number consists of two digits. The sum of the digits is 9. If 45 is subtracted from the number, its digits are interchanged. What is the number?

For integers a, b and c, what would be the minimum and maximum values respectively of

Given that a and b are integers and a + a² b³ is odd, which one of the following statements is correct?

From the time the front of a train enters a platform, it takes 25 seconds for the back of the train to leave the platform, while travelling at a constant speed of 54 km/h. At the same speed, it takes 14 seconds to pass a man running at 9 km/h in the same direction as the train. What is the length of the train and that of the platform in meters, respectively?

Which of the following functions describe the graph shown in the below figure?

Consider the following three statements:
(i) Some roses are red.
(ii) All red flowers fade quickly.
(iii) Some roses fade quickly.
Which of the following statements can be logically inferred from the above statements?

During the Pleistocene, which of the following groups experienced the largest mass extinction?

In group living species, the term “dilution effect” refers to

Which of the following diversity indices best captures species turnover across habitats?

A duck egg is removed from its mother’s nest and incubated by a barnyard hen. The duckling hatches out in the presence of the barnyard hen and stays in her nest. After a couple of days, the duckling is presented with a choice between its biological mother and the hen that incubated it. The duckling approaches and follows the hen. This set of observations demonstrates the phenomenon of   

If both of your ears were located next to each other in the middle of your face, you would have difficulty in resolving the

Forager bees communicate the distance of a food source using a waggle dance upon return to the hive. It is observed that the number of waggles of a dance increases linearly with the distance to the food source. This tells us that the

Male frogs display to females by producing loud acoustic signals. The use of these signals by bats to locate frogs and prey upon them is an example of   

A non-venomous, non-toxic species of snake is brightly coloured and closely resembles a venomous snake species in the same habitat. This is most likely a case of 

The value of the resting membrane potential of a typical neuron is closest to the equilibrium potential of which of the following ions?

A plant species found in India produces flowers that are white, fragrant, and tubular. Which of the following is the most likely pollinating agent?

Which of the following can be used to test differences between mean tree heights in a tropical versus a temperate forest?

For a species, assuming a relatively short time scale and no evolution, increased interspecific competition will result in a

In which of the following mating systems is sperm competition likely to evolve?

Copies of genes that arrive in a particular genome by horizontal gene transfer are known as

In which of the following plants is the dominant stage of the life cycle haploid? 

Which of the following is NOT typically a characteristic of early successional pioneer plants relative to late successional plants in a tropical rain forest?

Natural populations often deviate from Hardy-Weinberg equilibrium. One possible reason for this is

Which of the following is NOT an example of phenotypic plasticity?

 Which of the following is NOT a characteristic of r-selected species?

A scientist finds a new species of insect and sends a sample to a museum for confirmation. The curator of the museum designates it as a holotype for the newly identified species and asks the scientist to also provide samples of the opposite sex. This sample of the opposite sex is called the