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Previous year question hub

Comparative Anatomy and Organ-system Physiology - Animal Anatomy and Physiology - Life Sciences Previous Year Questions

Practice Comparative Anatomy and Organ-system Physiology - Animal Anatomy and Physiology - Life Sciences previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

20Papers
20Years
71Questions
1Topics

Comparative Anatomy and Organ-system Physiology question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Comparative Anatomy and Organ-system Physiology. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Easy 53 74.6%
Medium 18 25.4%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

MCQ 66 93%
Numerical Answer Type (NAT) 3 4.2%
MSQ 2 2.8%

Subject weightage

Top subjects by unique question coverage.

Life Sciences
71 Qs

Most asked topics

Top topics across the included previous year papers.

Animal Anatomy and Physiology
71 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Comparative Anatomy and Organ-system Physiology
71 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

Life Sciences (XL) 2026
3 Qs
Life Sciences (XL) 2025
3 Qs
Life Sciences (XL) 2024
4 Qs
Life Sciences (XL) 2023
1 Qs
Life Sciences (XL) 2022
4 Qs
Life Sciences (XL) 2021
3 Qs
Life Sciences (XL) 2020
5 Qs
Life Sciences (XL) 2019
3 Qs
Life Sciences (XL) 2018
5 Qs
Life Sciences (XL) 2017
1 Qs
Life Sciences (XL) 2016
4 Qs
Life Sciences (XL) 2015
1 Qs
Life Sciences (XL) 2014
3 Qs
Life Sciences (XL) 2013
2 Qs
Life Sciences (XL) 2012
7 Qs
Life Sciences (XL) 2011
6 Qs
Life Sciences (XL) 2010
4 Qs
Life Sciences (XL) 2009
7 Qs
Life Sciences (XL) 2008
1 Qs
Life Sciences (XL) 2007
4 Qs

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
Life Sciences (XL) 202620263View paper
Life Sciences (XL) 202520253View paper
Life Sciences (XL) 202420244View paper
Life Sciences (XL) 202320231View paper
Life Sciences (XL) 202220224View paper
Life Sciences (XL) 202120213View paper
Life Sciences (XL) 202020205View paper
Life Sciences (XL) 201920193View paper
Life Sciences (XL) 201820185View paper
Life Sciences (XL) 201720171View paper
Life Sciences (XL) 201620164View paper
Life Sciences (XL) 201520151View paper
Life Sciences (XL) 201420143View paper
Life Sciences (XL) 201320132View paper
Life Sciences (XL) 201220127View paper
Life Sciences (XL) 201120116View paper
Life Sciences (XL) 201020104View paper
Life Sciences (XL) 200920097View paper
Life Sciences (XL) 200820081View paper
Life Sciences (XL) 200720074View paper

All Comparative Anatomy and Organ-system Physiology previous year questions

Practice every matching question in batches of 20, with every available option.

1
2007 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2007
The air sac plays an important role in the aerial life of flying birds. Which of the following is not a function of the air sac ?
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2
2007 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2007
During development of the red blood cells from the stem cells of most mammals, the phenomenon of enucleation is observed during the last stage of differentiation. However, the red blood cells of some animals are nucleated: Identify which one of the following ?
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3
2007 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2007
1 kg bird is expected to have a heart of 8.2 g. For a mammal of the same size, the expected size of the heart could be
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4
2007 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2007
An elephant that weighs 3000 kg has a resting pulse rate of 25 per minute. What would be the possible range of the pulse rate of 3 g shrew (the smallest living mammal) ?
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5
2008 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2008
Digitoxigenin, a cardiotonic steroid that inhibits ATPase when applied on extra cellular face of membrane, helps in accumulation of Ca2+ inside the cardiac muscle cells by
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6
2009 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2009

Pernicious anemia is due to

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7
2009 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2009
Which of the following would be considered the longest feedback loop ?
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8
2009 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2009
During hibernation in a hibernating mammal, its body temperature would be
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9
2009 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2009
Anabolic steroids, taken illegally by sportspersons to enhance their physical strength, are synthetic analogues for natural ______________________ from the ______________.
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10
2009 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2009
Holometabolous insects go through a series of larval instars before molting into pupal stage, and into an adult. This developmental is regulated by three key hormones namely, brain hormone, ecdysone, and juvenile hormone. The main function of brain hormones is to
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11
2009 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2009
Acetylcholinesterase is an enzyme that degrades acetylcholine. What would be the effect of administration of an inhibitor of acetylcholinesterase on nerve transmission ?
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12
2009 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2009
Which one of the following comparisons between oogenesis and spermatogenesis in human is NOT correct ?
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13
2010 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2010

One of the following compounds is NOT a neurotransmitter

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14
2010 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2010
From the perspective of developmental origin, which of the following structures is homologous to a tortoise shell?
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15
2010 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2010

Which one of the following options is NOT a viable strategy for developing a female contraceptive? The administration of

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16
2010 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2010

Certain lung fishes that live in small stagnant fresh water pools produce urea as a nitrogenous waste. What is the advantage of this adaptation?

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17
2011 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2011
The horse has played a little known but very important role in the field of medicine. Horses were injected with toxins of diseases until their blood built up immunities. Then a serum was made from their blood. Serums to fight with diphtheria and tetanus were developed this way.
It can be inferred from the passage, that horses were
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18
2011 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2011
Match the items in Group I with those in Group II

Question diagram

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19
2011 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2011
In insect’s tracheal system, the transport of oxygen to the target tissue is done by
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20
2011 · Life Sciences · Animal Anatomy and Physiology · Comparative Anatomy and Organ-system Physiology
Life Sciences (XL) 2011
Which one of the following examples represents an adaptation or a physiological activity that DOES NOT minimize the loss of body temperature of animals?
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Showing 20 of 71 questions