GATE 2022 Ecology and Evolution (EY) Question Paper with Solutions PDFs are now available on this page. IIT Kharagpur successfully concluded GATE 2022 EY on 12th February 2022 in the Forenoon Session (9:00 AM to 12:00 PM). The overall difficulty level of GATE 2022 EY was rated moderate. The question paper was distributed among two sections i.e General Aptitude and core Ecology and Evolution based questions. The General Aptitude section carried 10 questions, carrying 15% of the total weightage. The remaining 85% weightage was carried by the core EY section.
GATE 2022 Ecology and Evolution (EY) Question Paper with Solutions
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You should ______ when to say ______.
Two straight lines pass through the origin \( (x_0, y_0) = (0, 0) \). One of them passes through the point \( (x_1, y_1) = (1, 3) \) and the other passes through the point \( (x_2, y_2) = (1, 2) \). What is the area enclosed between the straight lines in the interval \( [0, 1] \) on the x-axis?
If \[ p : q = 1 : 2, \quad q : r = 4 : 3, \quad r : s = 4 : 5 \]
and \( u \) is 50% more than \( s \), what is the ratio \( p : u \)?
Given the statements:
P is the sister of Q.
Q is the husband of R.
R is the mother of S.
T is the husband of P.
Based on the above information, T is _________ of S.
In the following diagram, the point R is the center of the circle. The lines PQ and ZV are tangential to the circle. The relation among the areas of the squares, PXWR, RUVZ and SPQT is
Healthy eating is a critical component of healthy aging. When should one start eating healthy? It turns out that it is never too early. For example, babies who start eating healthy in the first year are more likely to have better overall health as they get older.
P invested ₹ 5000 per month for 6 months of a year and Q invested ₹ x per month for 8 months of the year in a partnership business. The profit is shared in proportion to the total investment made in that year.
If at the end of that investment year, Q receives \( \frac{4}{9} \) of the total profit, what is the value of \( x \) (in ₹)?
The above frequency chart shows the frequency distribution of marks obtained by a set of students in an exam.
From the data presented above, which one of the following is CORRECT?
In the square grid shown on the left, a person standing at P2 position is required to move to P5 position.
The only movement allowed for a step involves, "two moves along one direction followed by one move in a perpendicular direction". The permissible directions for movement are shown as dotted arrows in the right.
For example, a person at a given position Y can move only to the positions marked X on the right.
Without occupying any of the shaded squares at the end of each step, the minimum number of steps required to go from P2 to P5 is:
Consider a cube made by folding a single sheet of paper of appropriate shape. The interior faces of the cube are all blank. However, the exterior faces that are not visible in the above view may not be blank. Which one of the following represents a possible unfolding of the cube?
Which one of the following options denotes the time when the majority of animal phyla first appeared in the fossil record? (MYA = Million Years Ago)
Consider the following strains of an influenza virus and their basic reproduction numbers (\(R_0\)). Assuming that they are all equally virulent, which one of the following strains would be most concerning for a completely vulnerable population of humans?
Which one of the following statements is true with respect to energy requirements of photosynthesis in C3 and C4 biochemical cycles?
Which one of the following is a proximate explanation for grouping in animals?
The ethologist Konrad Lorenz is known for his discovery of which one of the following processes?
Male stickleback fish develop red colour on their ventral side in the breeding season and maintain territories. When a conspecific male intruder enters their territory, resident males perform an aggressive display. The ethologist Niko Tinbergen presented models of different shapes to territorial male stickleback fish. He found that models of any shape elicited aggressive displays, provided the ventral part of the models was coloured red. This observation led to the development of which one of the following concepts?
Neuronal circuits that mediate escape responses in animals would perform best if they had which one of the following combination of properties?
Moth caterpillars that mimic bird droppings are an example of which one of the following phenomena?
Which one of the following processes is not likely to lead to the stable coexistence of two species at the same trophic level within an ecological community?
Which one of the following organisms is a cytoplasmically inherited symbiotic bacterium that can cause extreme female-biased sex ratios in many insects?
A cross between a pure-bred plant with red flowers and a pure-bred plant with white flowers produced F1 generation with pink flowers. If the plants with pink flowers are selfed, what is the proportion of white : pink : red flowers expected in the next generation?
A gene coding for a particular protein exhibits 2% DNA sequence divergence between humans and chimpanzees. However, protein sequences encoded by them are identical. Which one of the following processes explains this?
Which one of the following sets of characteristics is most likely to cause population extinction via demographic stochasticity?
Which one of the following is not an expected impact of global warming?
Which one of the following represents the chemical energy available to herbivores in an ecosystem?
Which one of the following major mass extinctions is the most recent?
Which one of the following does not help maintain genetic diversity at a given locus?
Which one of the following is potentially explained by the mid-domain effect?
The graph shows the yield of coffee plantations located at different distances from a patch of primary forest.
Which one of the following options best explains this pattern?
Which one or more of the following bird species is/are the focus of conservation-oriented captive breeding efforts in India?
Which one or more of the following is/are not an example of a zoonotic disease(s)?
Small islands tend to have fewer species than nearby large islands. Which one or more of the following reasons explain(s) this outcome?
The term “living fossil” applies to which one or more of the following organisms?
Which one or more of the following reasons has/have been invoked to explain island gigantism?
Which one or more of the following options represent(s) life history trade-offs?
Certain plants and animals rely on toxins such as cardiac glycosides for self-defense. Digitoxin and bufalin, structurally similar toxins produced by foxglove plants and bufonid toads, respectively, are one such example. Which one of the following statements about these toxins is correct?
A behavioural ecologist records the number of times a kingfisher succeeds in catching fish over multiple five-minute intervals. Which one of the following distributions best describes these data?
Excess fertilizers used in agriculture commonly end up as runoff and cause phytoplankton blooms in rivers. To figure out whether these blooms were driven by ammonium or phosphate fertilizers, researchers cultured a phytoplankton species in multiple samples of unpolluted river water. The samples were divided equally among three treatments: ammonium fertilizer added, phosphate fertilizer added, and no fertilizer added. They then measured phytoplankton density in each of the samples after a week. Phytoplankton densities (in thousands of cells/ml) are reported in the table shown.
S1 and S2 are two strains of bacteria. The results of a bacterial growth experiment on these strains measured after 24 hours are shown. Black and white bars represent S1 and S2, respectively.
Habitat P has twice the density of resources as habitat Q. Assume that individuals are identical, can move freely, have perfect information about the environment, and compete for resources when they are in a habitat. At equilibrium, which one of the following represents the predicted outcome?
Consider Holling’s Type-III functional response, as shown.
Which one of the marked points has the highest rate-of-change of prey-capture-rate?
In a population of birds on an island, the average beak size reduced over one generation. A researcher estimated the association between beak size and relative fitness, shown in the graph. The estimated slope was \(-0.05\) with a 95% confidence interval of \(-0.15\) to \(0.09\).
The Bateman gradient is a popular explanation for why the strength of sexual selection is typically stronger on males than on females. Which one of the following figures is the correct representation of the Bateman gradient? In all figures, the dotted line represents males and the solid line females.
Sparrows use two foraging tactics to obtain food. They either search for grains themselves (Producer tactic P) or follow other individuals and steal grains from them (Scrounger tactic S). The following graphs show how the fitness of each tactic (P : dashed line and S : solid line) varies as a function of the relative frequency of S. Which one of the graphs shows the correct representation of these tactics if they were maintained through negative frequency dependence?
Some lizard species show positive allometry in head width, with larger individuals investing disproportionately more in musculature leading to wider heads. To test for positive allometry in a study population, a researcher measures body size and head width for 100 individuals and fits a straight line to a log-log plot of these two traits. Which one of the following estimated values of the slope indicates support for positive allometry?
A team of ecologists laid 100 plots of 50 m \(\times\) 50 m in a forest and counted the number of individuals of a tree species in each plot. They then calculated the mean and variance of the number of individuals per plot. If trees are randomly distributed, then which one of the following relationships between the variance and mean is expected?
The following graphs show rank abundance data for species in three different communities P, Q and R. Based on both species richness and relative abundance, which one of the following options correctly represents the ordering of communities according to their species diversity?
Which one of the following cladograms represents the correct phylogenetic relationships in the Kingdom Animalia?
\(\beta\)-diversity quantifies the difference in species composition between two ecological communities. Which one of the following statements is correct about \(\beta\)-diversity?
Consider the logistic population growth model, given by
\[ \frac{dn}{dt} = r n \left( 1 - \frac{n}{k} \right) \]
where \(r\) is the intrinsic growth rate, \(n\) is the population size, and \(k\) is the carrying capacity. Which one or more of the following is/are assumption(s) of the model?
A bee species forages for nectar on a plant species which has yellow flowers. To find out what cues the bees use to recognize the flowers, researchers performed the following experiment. They presented individual bees with the stimuli given below and examined the proportion of bees that approached and landed on the stimuli. The results are shown below.
Which one or more of the following interpretation(s) of the experiment is/are correct?
Which one or more of the following reason(s) explain(s) why whales use low frequencies (infrasound) for mate-finding and high frequencies (ultrasound) for hunting prey?
The table shows the relative abundance of three potential prey species in the environment and in the diet of a bat predator.
Which one or more of the following options represent(s) an evolutionary arms race?
The figure shows an \(F\) probability density function. The two dotted lines represent critical values corresponding to a two-tailed \(F\)-test at a level of significance of 0.05. The observed \(F\)-statistic for two samples is indicated by the solid line.
Which one or more of the following conditions can lead to an increase in tree densities in tropical savannas?
Gene conversion can lead to which one or more of the following evolutionary outcomes?
If the observed heterozygosity at a locus is 0.6, which one or more of the following could produce this outcome?
Which one or more of the following reasons has/have been invoked to explain high species diversity in the tropics?
In a linear regression with a single continuous predictor and 100 data points, the residual degrees of freedom are ________ (Answer in integer).
The genome of an organism has 60% GC (Guanine-Cytosine) content. The Adenine in this genome is ________% (Answer in integer).
The prevalence of flu in a population is 1%. A diagnostic test has a false positive rate of 10% and a false negative rate of 10%. The probability that a randomly chosen person tests positive is ________ (Round off to three decimal places).
In a deer population, the male-to-female ratio is 1 : 2. The probability that a randomly formed group of size three has 2 males and 1 female is ________ (Round off to two decimal places).
The fitness \( f(n) \) of an individual in a group of size \( n \) is given by \[ f(n) = n(10 - n). \]
At evolutionary equilibrium, groups are found in two different sizes. If one group size is 6, the other group size must be ________ (Answer in integer).
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GATE 2022 EY Detailed Paper Analysis
A total of 65 questions listed in the question paper of GATE 2022 EY. Each question carried either 1 or 2 marks. Refer to the below-mentioned table, showing the details of questions and carried marks-
| Question Types | Question Frequency | Carried Marks |
|---|---|---|
| No. Of 1 mark MCQs | 24 | 24 |
| No. Of 2 marks MCQs | 19 | 38 |
| No. Of 1 mark MSQs | 6 | 6 |
| No. Of 2 marks MSQs | 11 | 22 |
| No. Of 1 mark NATs | - | - |
| No. Of 2 marks NATs | 5 | 10 |
| Total | 65 | 100 |
- NATs carried the least weightage in GATE 2022 EY
- There were only 5 NAT questions, each carrying 2 marks, appeared in GATE 2022 EY
- The General Aptitude section was rated easy, while the core EY section was rated moderate to tough
Also Check:
GATE 2022 EY: Exam Pattern and Marking Scheme
- GATE 2022 EY asked both MCQs and NATs. It was held online via CBT mode
- As per the specified marking scheme by IIT Delhi, from the final score, ⅓ and ⅔ marks would be reduced for each wrong MCQ carried 1 and 2 marks
- Wrong attempted NATs were not supposed to bring any kind of deduction in the final achieved marks
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