gate.iisc.ernet.in Graduate Aptitude Test in Engineering 2016 Question Paper : Indian Institute of Science

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Question Paper :

ECOLOGY AND EVOLUTION – EY :
Q. 1 – Q. 25 carry one mark each.

Related : Indian Institute of Science GATE 2016 Syllabus Graduate Aptitude Test in Engineering : www.entrance.net.in/4871.html

Q.1 A genetic locus has only two alleles in a population. The frequency of heterozygotes in that population is 0.32. Assuming Hardy-Weinberg equilibrium, the frequency (in decimal notation, not in fractions or percentage) of the rarer allele is __________

Q.2 In a population of asexual organisms that remains at a constant size, an individual is expected to have an average of _____ reproducing offspring.

Q.3 Which of the following processes captures the KEY DIFFERENCE between metapopulation versus single-population approaches to study population dynamics?
(A) Births and Deaths (B) Life history variation
(C) Immigration and Emigration (D) Environmental and demographic stochasticity

Q.4 A researcher used a t-test on two samples of data and obtained the following statistics: sample tstatistic = 5.2, critical t-statistic = 2.3 (for the appropriate degrees of freedom and alpha level of 0.05). Based on this information, the researcher should conclude that
(A) p < 0.05, reject the statistical null hypothesis
(B) p < 0.05, fail to reject the statistical null hypothesis
(C) p > 0.05, reject the statistical null hypothesis
(D) p > 0.05, fail to reject the statistical null hypothesis

Q.5 Among forests of the following states, tree diversity (e.g., species richness per unit area) is high in
P) Arunachal, Q) Haryana, R) Kerala, S) Punjab, T) Rajasthan.
(A) P and Q (B) Q and S (C) R, S, and T (D) P and R

Q.6 Many agriculturally important plants belong to which of the following families?
P) Dipterocarpaceae, Q) Poaceae, R) Solanaceae, S) Verbenaceae
(A) P and Q (B) Q and S (C) P and S (D) Q and R

Q.7 In India, Parthenium hysterophorus, Lantana camara, and Prosopis juliflora are examples of which of the following types of species?
P) Endangered species, Q) Endemic species, R) Invasive species, S) Keystone species.
(A) P only (B) P and Q (C) R only (D) S only

Q.8 Acid rain can be attributed to which of the following factors?
P) human alteration of global S cycle
Q) human alteration of global N cycle
R) increased average global temperature
S) natural causes such as fluctuation in sunspots
T) natural causes such as volcanism
(A) P, Q and R (B) P and R
(C) S and T (D) P, Q, and T

Q.9 Periodic glaciation at a global scale is a feature of which geological age?
(A) Cenozoic (B) Paleozoic (C) Jurassic (D) Archaean

Q.10 Carbon-fixation reactions using RUBISCO and PEP occur in
(A) C3 plants (B) C4 plants (C) CAM plants (D) C3, C4, and CAM plants

Q.12 Which of the following processes typically does NOT contribute to increase in genetic variation?
(A) Mutation
(B) Migration
(C) Drift
(D) Recombination

Q.13 Maximum heterozygosity (in decimal notation, not in fractions or percentage) at a neutral locus with two alleles, given random mating, is ________

Q.14 A predator encounters a group of 10 prey and kills one of them to feed. The probability of getting killed is the same for all prey individuals. The probability that a given prey is killed by the predator is _______

Q.15 All else being equal, among isolated populations comprising of 10, 100, 500 and 1000 individuals, the impact of random genetic drift is LOWEST in the population with _________ individuals.

Q.16 If the mean of a sample is 4 units and its variance is 16 units, then its coefficient of variation (in decimal notation, not in fractions or percentage) is _____

Q.17 A scientist wants to prove that some birds line their nests with aromatic herbs to protect their chicks against insects that parasitise them. Which of the following experiments will NOT help to investigate this hypothesis?
(A) treating the nests containing aromatic herbs with insecticides
(B) comparing insect parasite load in nests with and without aromatic herbs
(C) comparing the effect of aromatic and non-aromatic herbs on the number of parasites
(D) examining the impact of aromatic herbs on insect parasites under laboratory conditions

Q.18 Many cranes are highly endangered and are often raised in captivity in zoos by having wildcollected eggs hatched in incubators. The hatchlings are then reared by the zoo keepers in the absence of adult cranes. In order to ensure successful reproduction of these zoo-reared cranes in the wild, which of the following should NOT occur?
(A) Hatchlings must be fed their wild diet by the zoo keepers
(B) Hatchlings must be exposed to predators by the zoo keepers
(C) Hatchlings should imprint on the zoo keepers
(D) Hatchlings should be trained to forage naturally in the wild by the zoo keepers

Q.19 Acoustic signals degrade most rapidly in which of the following environments?
(A) In a rainforest
(B) At a depth of 100 ft in the open ocean
(C) In a desert
(D) In a Eucalyptus plantation

Q.20 A plant species X is dioecious, another plant species Y is bisexual and cross-pollinated, while a third plant species Z is bisexual and self-pollinated. All else being equal, what might be the expected pollen:ovule ratio when arranged in descending order?
(A) Y > Z > X
(B) X > Y = Z
(C) X > Y > Z
(D) X < Y = Z

Q.21 The nodes of Ranvier are
(A) junctions in connective tissue
(B) myelinated junctions in nerve cells
(C) nodes in sarcolemmas
(D) non-myelinated gaps in nerve cells

Q.22 Many agriculturally important insect pests belong to which of the following groups?
P) Coleoptera, Q) Odonata, R) Lepidoptera, S) Orthoptera, T) Chiroptera
(A) P, Q and S (B) S, R and T (C) Q, S and T (D) P, R and S

Q.23 Plasmodesmata are found in
(A) cyanobacteria
(B) plants
(C) invertebrates
(D) vertebrates