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NEET • BIOLOGY • STRUCTURAL ORGANISATION IN ANIMALS

Structural organisation in animals practice · Mixed difficulty

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Showing 31-60 of 307 questions

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31 Hard

31 of 307

Understanding +4 | -1

Aging of an animal body is associated with deterioration in its

View answer and explanation

Correct option: A

connective tissue

Option A (connective tissue) is correct because aging is primarily associated with the deterioration of connective tissues, affecting structural support and elasticity.

32 Easy

32 of 307

Remembering +4 | -1

The clitellum divides the body of earthworm into …… regions

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Correct option: A

Option A (3) is correct because the clitellum, a prominent glandular swelling, divides the earthworm's body into three regions: pre-clitellar, clitellar, and post-clitellar.

33 Hard

33 of 307

Remembering +4 | -1

What type of animal tissue changes a blood vessel’s diameter?

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Correct option: C

Muscle

Option C (Muscle) is correct because muscle tissue, specifically smooth muscle in the walls of blood vessels, controls the diameter through contraction and relaxation.

34 Hard

34 of 307

Remembering +4 | -1

Transparent part of human nail is made up of

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Correct option: A

Living protein eledein

Option A (Living protein eledein) is correct because the transparent part of the nail is made of eleidin, a living protein.

35 Easy

35 of 307

Remembering +4 | -1

Each organ of human body is made up of one or more type of

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Correct option: A

Tissue

Option A (Tissue) is correct because organs are composed of one or more types of tissues, which perform specific functions.

36 Medium

36 of 307

Understanding +4 | -1

Which of the following are composed of
involuntary and unstriated muscles?

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Correct option: D

Gastric wall and Artery wall

Option D (Gastric wall and Artery wall) is correct because both the gastric wall and artery wall contain involuntary and unstriated (smooth) muscles.

37 Medium

37 of 307

Remembering +4 | -1

Which one of the following is not the characteristic feature of frog?

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Correct option: B

Each of the fore limbs and hindlimbs end in five digits

Option B (Each of the fore limbs and hindlimbs end in five digits) is correct because frogs have four digits on their forelimbs and five digits on their hindlimbs.

38 Medium

38 of 307

Remembering +4 | -1

Alimentary canal wall contains

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Correct option: C

Smooth muscles

Option C (Smooth muscles) is correct because the walls of the alimentary canal contain smooth muscles, which are responsible for peristalsis (involuntary contractions).

39 Medium

39 of 307

Analyzing +4 | -1

Assertion: Extracellular materials help in separation of
cells
Reason: Cell junctions are formed by extra cellular
materials

View answer and explanation

Correct option: B

If both the assertion and reason are true but the reason is
not a correct explanation of the
assertion.

Option B (If both the assertion and reason are true but the reason is not a correct explanation of the assertion) is correct because extracellular materials help in cell separation and cell junctions are formed by them, but they are not directly related.

40 Easy

40 of 307

Remembering +4 | -1

Which of the following part of the alimentary canal of cockroaches is used for storing food?

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Correct option: A

Crop

Option A (Crop) is correct because the crop in the cockroach's alimentary canal is used for storing food before it is passed to the gizzard for grinding.

41 Medium

41 of 307

Analyzing +4 | -1

Which of the following is incorrect about the skeletal muscle?

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Correct option: C

Voluntary nature

Option A (Not under direct control of CNS) is incorrect because skeletal muscles *are* under direct voluntary control of the central nervous system (CNS).

42 Easy

42 of 307

Remembering +4 | -1

Fertilized eggs of Periplanata Americana are encased in

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Correct option: A

Ootheca

Option A (Ootheca) is correct because the fertilized eggs of Periplaneta Americana are encased in a structure called the ootheca, which is a dark reddish-brown capsule.

43 Hard

43 of 307

Understanding +4 | -1

This feature is not found in Periplaneta Americana

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Correct option: A

During embryonic development, indeterminate and radial cleavage occur

Option A (During embryonic development, indeterminate and radial cleavage occur) is the feature not found in Periplaneta Americana because insects exhibit determinate and spiral cleavage.

44 Hard

44 of 307

Remembering +4 | -1

Ecdysone is produced by

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Correct option: A

Prothoracic gland

Option A (Prothoracic gland) is correct because ecdysone, the molting hormone, is produced by the prothoracic gland in insects.

45 Easy

45 of 307

Analyzing +4 | -1

Select the odd one out regarding excretion in cockroach.

View answer and explanation

Correct option: C

Antennal glands

Option C (Antennal glands) is correct because antennal glands are not involved in excretion in cockroaches; Malpighian tubules, fat bodies, nephrocytes, and urecose glands are.

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46 Easy

46 of 307

Remembering +4 | -1

Agranulocytes are

View answer and explanation

Correct option: A

Lymphocytes and monocytes

Option A (Lymphocytes and monocytes) is correct because they lack visible granules in their cytoplasm.

47 Easy

47 of 307

Remembering +4 | -1

The tissue which forms the glands in humans is

View answer and explanation

Correct option: C

Epithelium tissue

Epithelial tissue forms the glands in humans because of its specialized secretory function.

48 Medium

48 of 307

Remembering +4 | -1

Matrix secreting cells of cartilage are known as

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Correct option: A

Chondrocytes

Option A (Chondrocytes) is correct because chondrocytes are the cells responsible for secreting and maintaining the matrix of cartilage.

49 Medium

49 of 307

Analyzing +4 | -1

How many of the following statements is/are incorrect?

A. Glandular epithelium may be unicellular or multicellular.

B. Salivary glands have multicellular glandular epithelium.

C. Products of exocrine glands bathe the gland.

D. Compound epithelium has a major role in secretion and
absorption.

View answer and explanation

Correct option: B

Option B (2) is correct because two of the statements (C and D) are incorrect regarding glandular and compound epithelium.

50 Easy

50 of 307

Understanding +4 | -1

The integument of the frog is always kept moist because

View answer and explanation

Correct option: B

It performs cutaneous respiration

Option B (It performs cutaneous respiration) is correct because the moist skin of a frog is essential for cutaneous respiration, allowing for gas exchange.

51 Hard

51 of 307

Understanding +4 | -1

Which of the following statement(s) is/are correct regarding compound epithelium?

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Correct option: D

All of the above.

Option D (All of the above) is correct because all the statements accurately describe the characteristics and functions of compound epithelium.

52 Easy

52 of 307

Remembering +4 | -1

Which of the following cell is rounded and biconcave in shape?

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Correct option: B

RBCs

Option B (RBCs) is correct because red blood cells (RBCs) are distinctively rounded and biconcave in shape, which increases their surface area for gas exchange.

53 Hard

53 of 307

Remembering +4 | -1

Which type of mouthparts is present on the lateral side of the pre-oral cavity in cockroach?

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Correct option: A

Labrum and mandibles

Option A (Labrum and mandibles) is correct because the labrum and mandibles are located on the lateral side of the pre-oral cavity in cockroaches.

54 Medium

54 of 307

Analyzing +4 | -1

How many features given below are not related to female frog?

(a) Reproductive organs include a pair of ovaries.

(b) Absence of copulatory pad on the first digit of the fore limbs.

(c) Presence of sound producing vocal sacs.

(d) The ovaries are situated near kidneys and there is functional connection with kidneys.

(e) Mature female can lay 2500-3000 ova at a time Select the correct option.

View answer and explanation

Correct option: B

Two

Option B (Two) is correct because the presence of vocal sacs and the functional connection between ovaries and kidneys are not features of female frogs.

55 Easy

55 of 307

Remembering +4 | -1

The cavities of alveoli of lungs are lined by

View answer and explanation

Correct option: D

Squamous epithelium

Option D (Squamous epithelium) is correct because squamous epithelium is a single layer of flattened cells, ideal for gas exchange in the alveoli of the lungs.

56 Easy

56 of 307

Understanding +4 | -1

Cells are autonomous because:

View answer and explanation

Correct option: D

All of the above

Option D (All of the above) is correct because cells can synthesize components, grow and divide, and have their own lifespan, making them autonomous.

57 Medium

57 of 307

Remembering +4 | -1

Goblet cells are

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Correct option: A

Unicellular glands

Option A (Unicellular glands) is correct because goblet cells are single-celled glands that secrete mucus.

58 Easy

58 of 307

Remembering +4 | -1

….. type of junction is found in the epithelium and other tissues. Fill up the blank by using a suitable word

View answer and explanation

Correct option: B

Three

Option B (Three) is correct because there are three main types of cell junctions in epithelium: tight junctions, adherens junctions, and gap junctions.

59 Medium

59 of 307

Understanding +4 | -1

Which of the following features is not present in

Periplaneta\,americana

View answer and explanation

Correct option: B

Indeterminate and radial cleavage during embryonic development

Option B (Indeterminate and radial cleavage during embryonic development) is correct because cockroaches exhibit determinate and spiral cleavage, not indeterminate and radial cleavage.

60 Easy

60 of 307

Understanding +4 | -1

Assertion (A) Earthworms are known as ‘friends of
farmers’.
Reason (R) These help in increasing soil fertility by the
process of vermicomposting

View answer and explanation

Correct option: A

If both A and R are true and R is the correct explanation
of A

Option A (If both A and R are true and R is the correct explanation of A) is correct because earthworms improve soil fertility through vermicomposting, which is why they are considered 'friends of farmers'.

Revision notes and key takeaways

Review STRUCTURAL ORGANISATION IN ANIMALS in your textbook or class notes, then use this set to check your understanding.

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