Ecology and Evolution (EY) 2026

1

2026 · Unclassified

Ecology and Evolution (EY) 2026

Two tiles are missing in Panel I. Which one of the options in Panel II is the appropriate choice for the missing tiles?

A

(i)

B

(ii)

C

(iii)

D

(iv)

2

2026 · Unclassified

Ecology and Evolution (EY) 2026

Figures (i) and (ii) represent intercity highway systems. The black dots represent cities and the line segments between them represent intercity highways. A salesperson needs to make a trip. She needs to start from a city, visit each of the remaining cities exactly once, and finally return to the same city from which she started. Which one of the following options is then true?

A

Such a trip is possible for (i), but not for (ii).

B

Such a trip is possible for (ii), but not for (i).

C

Such a trip is possible for both (i) and (ii).

D

Such a trip is possible neither for (i) nor for (ii).

3

2026 · Unclassified

Ecology and Evolution (EY) 2026

The figure in Panel I below is a grid of cells with four rows and four columns. The numbers on the top and on the left represent the number of cells that are to be shaded in that column and row, respectively. Which one of the options shown in Panel II below represents the grid shaded correctly?

A

(i)

B

(ii)

C

(iii)

D

(iv)

4

2026 · Unclassified

Ecology and Evolution (EY) 2026

An unbiased six-faced dice whose faces are marked with numbers 1, 2, 3, 4, 5, and 6 is rolled twice in succession and the number on the top face is recorded each time. The probability that the sum of the two recorded numbers is a prime number is _____

A

3/36

B

13/36

C

15/36

D

19/36

5

2026 · Unclassified

Ecology and Evolution (EY) 2026

Two sister species, A and B, are distributed along a continuous elevational gradient in the Himalayas. Species A is distributed from the foothills to 1800 metres above sea level and species B is distributed from 1800 to 3500 metres above sea level. Which one of the following modes of speciation best explains their distribution?

A

Sympatric speciation

B

Allopatric speciation

C

Parapatric speciation

D

Peripatric speciation

6

2026 · Unclassified

Ecology and Evolution (EY) 2026

Which one of the following is an invasive plant species in India?

A

Lantana camara

B

Myristica malabarica

C

Terminalia tomentosa

D

Santalum album