GATE  >  Ecology and Evolution - EY 2018 GATE Paper with solution

# Ecology and Evolution - EY 2018 GATE Paper with solution - GATE Past Year Papers for Practice (All Branches)

``` Page 1

GATE 2018                                                                                            General Aptitude (GA) Set-1
GA 1/2
Q. 1 – Q. 5 carry one mark each.
Q.1  “Going by the _________ that many hands make light work, the school _______ involved
all the students in the task .”

The words that best fill the blanks in the above sentence are

(A) principle, principal (B) principal, principle
(C) principle, principle (D) principal, principal

Q.2  “Her _______ should not be confused with miserliness; she is ever willing to assist those in
need. ”

The word that best fills the blank in the above sentence is

(A) cleanliness (B) punctuality (C) frugality (D) greatness

Q.3  Seven machines take 7 minutes to make 7 identical toys. At the same rate, how many
minutes would it take for 100 machines to make 100 toys?

(A) 1 (B) 7 (C) 100 (D) 700

Q.4  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 m
2
of area. What is the area of the
original rectangle in square meters?

(A) 1125 (B) 2250 (C) 2924 (D) 4500

Q.5  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?

(A) 63 (B) 72 (C) 81 (D) 90

Q. 6 – Q. 10 carry two marks each.

Q.6  For integers ?? , ?? and ?? , what would be the minimum and maximum values respectively of
?? + ?? + ?? if log |?? | + log |?? | + log |?? | = 0?

(A) -3 and 3 (B) -1 and 1 (C) -1 and 3 (D) 1 and 3

Page 2

GATE 2018                                                                                            General Aptitude (GA) Set-1
GA 1/2
Q. 1 – Q. 5 carry one mark each.
Q.1  “Going by the _________ that many hands make light work, the school _______ involved
all the students in the task .”

The words that best fill the blanks in the above sentence are

(A) principle, principal (B) principal, principle
(C) principle, principle (D) principal, principal

Q.2  “Her _______ should not be confused with miserliness; she is ever willing to assist those in
need. ”

The word that best fills the blank in the above sentence is

(A) cleanliness (B) punctuality (C) frugality (D) greatness

Q.3  Seven machines take 7 minutes to make 7 identical toys. At the same rate, how many
minutes would it take for 100 machines to make 100 toys?

(A) 1 (B) 7 (C) 100 (D) 700

Q.4  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 m
2
of area. What is the area of the
original rectangle in square meters?

(A) 1125 (B) 2250 (C) 2924 (D) 4500

Q.5  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?

(A) 63 (B) 72 (C) 81 (D) 90

Q. 6 – Q. 10 carry two marks each.

Q.6  For integers ?? , ?? and ?? , what would be the minimum and maximum values respectively of
?? + ?? + ?? if log |?? | + log |?? | + log |?? | = 0?

(A) -3 and 3 (B) -1 and 1 (C) -1 and 3 (D) 1 and 3

GATE 2018                                                                                            General Aptitude (GA) Set-1
GA 2/2
Q.7  Given that ?? and ?? are integers and ?? + ?? 2
?? 3
is odd, which one of the following
statements is correct?

(A) ?? and ?? are both odd (B) ?? and ?? are both even
(C) ?? is even and ?? is odd (D) ?? is odd and ?? is even

Q.8  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?

(A) 210 and 140 (B) 162.5 and 187.5
(C) 245 and 130 (D) 175 and 200

Q.9  Which of the following functions describe the graph shown in the below figure?

(A) ?? = ||?? | + 1| - 2 (B) ?? = ||?? | - 1| - 1
(C) ?? = ||?? | + 1| - 1 (D) ?? = ||?? - 1| - 1|

Q.10  Consider the following three statements:
(i) Some roses are red.
(ii) All red flowers fade quickly.

Which of the following statements can be logically inferred from the above statements?

(A) If (i) is true and (ii) is false, then (iii) is false.
(B) If (i) is true and (ii) is false, then (iii) is true.
(C) If (i) and (ii) are true, then (iii) is true.
(D) If (i) and (ii) are false, then (iii) is false.

END OF THE QUESTION PAPER

Page 3

GATE 2018                                                                                            General Aptitude (GA) Set-1
GA 1/2
Q. 1 – Q. 5 carry one mark each.
Q.1  “Going by the _________ that many hands make light work, the school _______ involved
all the students in the task .”

The words that best fill the blanks in the above sentence are

(A) principle, principal (B) principal, principle
(C) principle, principle (D) principal, principal

Q.2  “Her _______ should not be confused with miserliness; she is ever willing to assist those in
need. ”

The word that best fills the blank in the above sentence is

(A) cleanliness (B) punctuality (C) frugality (D) greatness

Q.3  Seven machines take 7 minutes to make 7 identical toys. At the same rate, how many
minutes would it take for 100 machines to make 100 toys?

(A) 1 (B) 7 (C) 100 (D) 700

Q.4  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 m
2
of area. What is the area of the
original rectangle in square meters?

(A) 1125 (B) 2250 (C) 2924 (D) 4500

Q.5  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?

(A) 63 (B) 72 (C) 81 (D) 90

Q. 6 – Q. 10 carry two marks each.

Q.6  For integers ?? , ?? and ?? , what would be the minimum and maximum values respectively of
?? + ?? + ?? if log |?? | + log |?? | + log |?? | = 0?

(A) -3 and 3 (B) -1 and 1 (C) -1 and 3 (D) 1 and 3

GATE 2018                                                                                            General Aptitude (GA) Set-1
GA 2/2
Q.7  Given that ?? and ?? are integers and ?? + ?? 2
?? 3
is odd, which one of the following
statements is correct?

(A) ?? and ?? are both odd (B) ?? and ?? are both even
(C) ?? is even and ?? is odd (D) ?? is odd and ?? is even

Q.8  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?

(A) 210 and 140 (B) 162.5 and 187.5
(C) 245 and 130 (D) 175 and 200

Q.9  Which of the following functions describe the graph shown in the below figure?

(A) ?? = ||?? | + 1| - 2 (B) ?? = ||?? | - 1| - 1
(C) ?? = ||?? | + 1| - 1 (D) ?? = ||?? - 1| - 1|

Q.10  Consider the following three statements:
(i) Some roses are red.
(ii) All red flowers fade quickly.

Which of the following statements can be logically inferred from the above statements?

(A) If (i) is true and (ii) is false, then (iii) is false.
(B) If (i) is true and (ii) is false, then (iii) is true.
(C) If (i) and (ii) are true, then (iii) is true.
(D) If (i) and (ii) are false, then (iii) is false.

END OF THE QUESTION PAPER

GATE 2018                                                                                                                                                                         Ecology and Evolution
EY 1/22
Q. 1 – Q. 25 carry one mark each.

Q.1  During the Pleistocene, which of the following groups experienced the largest mass
extinction?

(A) Large dinosaurs
(B) Large mammals
(C) Reptiles
(D) Trilobites

Q.2  In group living species, the term “dilution effect” refers to

(A) reduction in aggression among individuals with increasing group size
(B) reduction in the mobility of individuals with increasing group size
(C) reduction in the reproductive success of individuals with increasing group size
(D) reduction in the risk of predation of individuals with increasing group size

Q.3  Which of the following diversity indices best captures species turnover across
habitats?

(A) ? (B) ? ? (C)  ? (D)  ?

Page 4

GATE 2018                                                                                            General Aptitude (GA) Set-1
GA 1/2
Q. 1 – Q. 5 carry one mark each.
Q.1  “Going by the _________ that many hands make light work, the school _______ involved
all the students in the task .”

The words that best fill the blanks in the above sentence are

(A) principle, principal (B) principal, principle
(C) principle, principle (D) principal, principal

Q.2  “Her _______ should not be confused with miserliness; she is ever willing to assist those in
need. ”

The word that best fills the blank in the above sentence is

(A) cleanliness (B) punctuality (C) frugality (D) greatness

Q.3  Seven machines take 7 minutes to make 7 identical toys. At the same rate, how many
minutes would it take for 100 machines to make 100 toys?

(A) 1 (B) 7 (C) 100 (D) 700

Q.4  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 m
2
of area. What is the area of the
original rectangle in square meters?

(A) 1125 (B) 2250 (C) 2924 (D) 4500

Q.5  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?

(A) 63 (B) 72 (C) 81 (D) 90

Q. 6 – Q. 10 carry two marks each.

Q.6  For integers ?? , ?? and ?? , what would be the minimum and maximum values respectively of
?? + ?? + ?? if log |?? | + log |?? | + log |?? | = 0?

(A) -3 and 3 (B) -1 and 1 (C) -1 and 3 (D) 1 and 3

GATE 2018                                                                                            General Aptitude (GA) Set-1
GA 2/2
Q.7  Given that ?? and ?? are integers and ?? + ?? 2
?? 3
is odd, which one of the following
statements is correct?

(A) ?? and ?? are both odd (B) ?? and ?? are both even
(C) ?? is even and ?? is odd (D) ?? is odd and ?? is even

Q.8  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?

(A) 210 and 140 (B) 162.5 and 187.5
(C) 245 and 130 (D) 175 and 200

Q.9  Which of the following functions describe the graph shown in the below figure?

(A) ?? = ||?? | + 1| - 2 (B) ?? = ||?? | - 1| - 1
(C) ?? = ||?? | + 1| - 1 (D) ?? = ||?? - 1| - 1|

Q.10  Consider the following three statements:
(i) Some roses are red.
(ii) All red flowers fade quickly.

Which of the following statements can be logically inferred from the above statements?

(A) If (i) is true and (ii) is false, then (iii) is false.
(B) If (i) is true and (ii) is false, then (iii) is true.
(C) If (i) and (ii) are true, then (iii) is true.
(D) If (i) and (ii) are false, then (iii) is false.

END OF THE QUESTION PAPER

GATE 2018                                                                                                                                                                         Ecology and Evolution
EY 1/22
Q. 1 – Q. 25 carry one mark each.

Q.1  During the Pleistocene, which of the following groups experienced the largest mass
extinction?

(A) Large dinosaurs
(B) Large mammals
(C) Reptiles
(D) Trilobites

Q.2  In group living species, the term “dilution effect” refers to

(A) reduction in aggression among individuals with increasing group size
(B) reduction in the mobility of individuals with increasing group size
(C) reduction in the reproductive success of individuals with increasing group size
(D) reduction in the risk of predation of individuals with increasing group size

Q.3  Which of the following diversity indices best captures species turnover across
habitats?

(A) ? (B) ? ? (C)  ? (D)  ?

GATE 2018                                                                                                                                                                         Ecology and Evolution
EY 2/22

Q.4  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

(A) habituation
(B) imprinting
(C) instinct
(D) sensitization

Q.5  If both of your ears were located next to each other in the middle of your face, you
would have difficulty in resolving the

(A) direction of a sound
(B) duration of a sound
(C) loudness of a sound
(D) pitch of a sound

Q.6  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

(A) number of waggles and distance to food source is negatively correlated
(B) number of waggles and distance to food source is positively correlated
(C) number of waggles affects the distance to the food source
(D) number of waggles and the distance to the food source are uncorrelated

Page 5

GATE 2018                                                                                            General Aptitude (GA) Set-1
GA 1/2
Q. 1 – Q. 5 carry one mark each.
Q.1  “Going by the _________ that many hands make light work, the school _______ involved
all the students in the task .”

The words that best fill the blanks in the above sentence are

(A) principle, principal (B) principal, principle
(C) principle, principle (D) principal, principal

Q.2  “Her _______ should not be confused with miserliness; she is ever willing to assist those in
need. ”

The word that best fills the blank in the above sentence is

(A) cleanliness (B) punctuality (C) frugality (D) greatness

Q.3  Seven machines take 7 minutes to make 7 identical toys. At the same rate, how many
minutes would it take for 100 machines to make 100 toys?

(A) 1 (B) 7 (C) 100 (D) 700

Q.4  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 m
2
of area. What is the area of the
original rectangle in square meters?

(A) 1125 (B) 2250 (C) 2924 (D) 4500

Q.5  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?

(A) 63 (B) 72 (C) 81 (D) 90

Q. 6 – Q. 10 carry two marks each.

Q.6  For integers ?? , ?? and ?? , what would be the minimum and maximum values respectively of
?? + ?? + ?? if log |?? | + log |?? | + log |?? | = 0?

(A) -3 and 3 (B) -1 and 1 (C) -1 and 3 (D) 1 and 3

GATE 2018                                                                                            General Aptitude (GA) Set-1
GA 2/2
Q.7  Given that ?? and ?? are integers and ?? + ?? 2
?? 3
is odd, which one of the following
statements is correct?

(A) ?? and ?? are both odd (B) ?? and ?? are both even
(C) ?? is even and ?? is odd (D) ?? is odd and ?? is even

Q.8  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?

(A) 210 and 140 (B) 162.5 and 187.5
(C) 245 and 130 (D) 175 and 200

Q.9  Which of the following functions describe the graph shown in the below figure?

(A) ?? = ||?? | + 1| - 2 (B) ?? = ||?? | - 1| - 1
(C) ?? = ||?? | + 1| - 1 (D) ?? = ||?? - 1| - 1|

Q.10  Consider the following three statements:
(i) Some roses are red.
(ii) All red flowers fade quickly.

Which of the following statements can be logically inferred from the above statements?

(A) If (i) is true and (ii) is false, then (iii) is false.
(B) If (i) is true and (ii) is false, then (iii) is true.
(C) If (i) and (ii) are true, then (iii) is true.
(D) If (i) and (ii) are false, then (iii) is false.

END OF THE QUESTION PAPER

GATE 2018                                                                                                                                                                         Ecology and Evolution
EY 1/22
Q. 1 – Q. 25 carry one mark each.

Q.1  During the Pleistocene, which of the following groups experienced the largest mass
extinction?

(A) Large dinosaurs
(B) Large mammals
(C) Reptiles
(D) Trilobites

Q.2  In group living species, the term “dilution effect” refers to

(A) reduction in aggression among individuals with increasing group size
(B) reduction in the mobility of individuals with increasing group size
(C) reduction in the reproductive success of individuals with increasing group size
(D) reduction in the risk of predation of individuals with increasing group size

Q.3  Which of the following diversity indices best captures species turnover across
habitats?

(A) ? (B) ? ? (C)  ? (D)  ?

GATE 2018                                                                                                                                                                         Ecology and Evolution
EY 2/22

Q.4  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

(A) habituation
(B) imprinting
(C) instinct
(D) sensitization

Q.5  If both of your ears were located next to each other in the middle of your face, you
would have difficulty in resolving the

(A) direction of a sound
(B) duration of a sound
(C) loudness of a sound
(D) pitch of a sound

Q.6  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

(A) number of waggles and distance to food source is negatively correlated
(B) number of waggles and distance to food source is positively correlated
(C) number of waggles affects the distance to the food source
(D) number of waggles and the distance to the food source are uncorrelated

GATE 2018                                                                                                                                                                         Ecology and Evolution
EY 3/22

Q.7  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) aposematism
(B) deception
(C) eavesdropping
(D) mimicry

Q.8  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

(A) aggressive mimicry
(B) Batesian mimicry
(D) Müllerian mimicry

Q.9  The value of the resting membrane potential of a typical neuron is closest to the
equilibrium potential of which of the following ions?

(A) Ca
++
(B) ? K
+
(C)  Mg
++
(D)  Na
+

Q.10  A plant species found in India produces flowers that are white, fragrant, and tubular.
Which of the following is the most likely pollinating agent?

(A) Hummingbirds  (B) Lorises
(C) Moths (D) Wind

```

## GATE Past Year Papers for Practice (All Branches)

407 docs|127 tests

## FAQs on Ecology and Evolution - EY 2018 GATE Paper with solution - GATE Past Year Papers for Practice (All Branches)

 1. What is the significance of studying ecology and evolution?
Ans. Studying ecology and evolution is significant because it helps us understand the relationships between organisms and their environment, as well as the processes and mechanisms that drive the diversity and adaptation of species over time.
 2. How does ecology differ from evolution?
Ans. Ecology focuses on the interactions between organisms and their environment, while evolution examines how species change and adapt over time through genetic variations and natural selection.
 3. What are some key concepts in ecology and evolution?
Ans. Some key concepts in ecology include population dynamics, community interactions, and ecosystem functioning. In evolution, key concepts include natural selection, genetic drift, and speciation.
 4. How does human activity impact ecology and evolution?
Ans. Human activity can have significant impacts on ecology and evolution. Activities such as habitat destruction, pollution, and climate change can disrupt ecosystems and drive species to extinction. Additionally, selective pressures caused by human activities can lead to rapid evolution and adaptation in certain populations.
 5. How are ecology and evolution relevant to conservation biology?
Ans. Ecology and evolution are fundamental to conservation biology. Understanding the ecological dynamics and evolutionary processes of species is essential for developing effective conservation strategies and managing biodiversity. By studying these disciplines, scientists can identify threats to species, predict their responses to environmental changes, and develop conservation plans to maintain healthy ecosystems.

## GATE Past Year Papers for Practice (All Branches)

407 docs|127 tests

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