Blood – Transport of various substances

Smooth muscle fibres – Tapered at both ends

Cardiac muscle fibres – Cylindrical and branched

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NEET • BIOLOGY • STRUCTURAL ORGANISATION IN ANIMALS

Structural organisation in animals practice · Easy

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Showing 1-30 of 107 questions

1 Easy

1 of 107

Understanding +4 | -1

\underline {\,\,\,\,\,\mathrm{A}\,\,\,\,\,\,\,}

epithelium is involved in secretion and absorption and is found in

\underline {\,\,\,\,\,\mathrm{B}\,\,\,\,\,\,\,}

View answer and explanation

Correct option: C

A-Columnar, B-lining of intestine

Option C (A-Columnar, B-lining of intestine) is correct because columnar epithelium is specialized for secretion and absorption and is found lining the intestine.

2 Easy

2 of 107

Understanding +4 | -1

Read the following 4-statements (i – iv) and accordingly mark the option that has both correct statements.
i) Cardiac fibres are branched with one or more nuclei.
ii) Smooth muscles are unbranched and cylindrical.
iii) Striated muscles can be branched or unbranched.
iv) Involuntary muscles are non-striated.

View answer and explanation

Correct option: D

(i) and (iii)

Option D ((i) and (iii)) is correct because cardiac fibers are branched with one or more nuclei, and striated muscles can be branched or unbranched.

3 Easy

3 of 107

Understanding +4 | -1

In water, the skin of the frog performs the function of

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Correct option: C

Diffusion

Option C (Diffusion) is correct because the frog's skin allows for the exchange of gases (oxygen and carbon dioxide) through diffusion in water.

4 Easy

4 of 107

Understanding +4 | -1

Choose the incorrect pair from the matches given below

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Correct option: D

Crop – Grinding food

Option D (Crop – Grinding food) is correct because the crop is for storing food, while the gizzard (proventriculus) is responsible for grinding food.

5 Easy

5 of 107

Analyzing +4 | -1

Read the following statements and find out the incorrect statement

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Correct option: D

None of the above

Option D (None of the above) is correct because all the statements are correct regarding cockroaches.

6 Easy

6 of 107

Understanding +4 | -1

Adipose tissue is similar to areolar tissue in all of the following, except

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Correct option: D

Storage of fat as main function

Option D (Storage of fat as main function) is correct because while both are connective tissues, adipose tissue's primary function is fat storage, unlike areolar tissue.

7 Easy

7 of 107

Remembering +4 | -1

Mast cells are associated with

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Correct option: C

Areolar connective tissue

Option C (Areolar connective tissue) is correct because mast cells are found within areolar connective tissue and play a role in inflammation and allergic reactions.

8 Easy

8 of 107

Remembering +4 | -1

Which of the following epithelium is composed of single layer of tall and slender cells?

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Correct option: B

Columnar epithelium

Option B (Columnar epithelium) is correct because columnar epithelium consists of tall and slender cells.

9 Easy

9 of 107

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.

10 Easy

10 of 107

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.

11 Easy

11 of 107

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.

12 Easy

12 of 107

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.

13 Easy

13 of 107

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.

14 Easy

14 of 107

Remembering +4 | -1

Agranulocytes are

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Correct option: A

Lymphocytes and monocytes

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

15 Easy

15 of 107

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.

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16 Easy

16 of 107

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.

17 Easy

17 of 107

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.

18 Easy

18 of 107

Remembering +4 | -1

The cavities of alveoli of lungs are lined by

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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.

19 Easy

19 of 107

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.

20 Easy

20 of 107

Remembering +4 | -1

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

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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.

21 Easy

21 of 107

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

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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'.

22 Easy

22 of 107

Understanding +4 | -1

Assertion: Development of earthworm is direct type
Reason: There is no larva stage in development

View answer and explanation

Correct option: A

If both the assertion and the reason are true and the
reason is a correct explanation of the
assertion

Option A (If both the assertion and the reason are true and the reason is a correct explanation of the assertion) is correct because earthworm development is direct, meaning there is no larval stage, and the reason correctly explains why.

23 Easy

23 of 107

Understanding +4 | -1

Which of the following statements wrongly represents the nature of smooth muscle?

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Correct option: A

Communication among the cells is performed by intercalated discs

Option A (Communication among the cells is performed by intercalated discs) is correct because intercalated discs are characteristic of cardiac muscle, not smooth muscle.

24 Easy

24 of 107

Understanding +4 | -1

In a tissue the structure of cells varies according to their

View answer and explanation

Correct option: B

Function

Option B (Function) is correct because the structure of cells is directly related to the specific function they perform within a tissue.

25 Easy

25 of 107

Remembering +4 | -1

The excitable unit of neural system is

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Correct option: A

Neuron

Option A (Neuron) is correct because the neuron is the fundamental functional unit of the nervous system responsible for transmitting electrical and chemical signals.

26 Easy

26 of 107

Remembering +4 | -1

The highly degraded organic matter rich in nitrogen and potassium in particular resulting from the activity of earthworms, is called

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Correct option: B

Vermicompost

Option B (Vermicompost) is correct because vermicompost is the product of earthworm activity, resulting in highly degraded organic matter rich in nitrogen and potassium.

27 Easy

27 of 107

Remembering +4 | -1

In frog, for the digestion of food, wall of the stomach secretes

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Correct option: C

HCl and gastric juices

Option D (HCl and pepsin) is correct because the stomach wall in frogs secretes hydrochloric acid (HCl) and gastric juices containing pepsin for food digestion.

28 Easy

28 of 107

Remembering +4 | -1

A type of cell junction which primarily helps to cement neighbouring cells to keep them together is called

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Correct option: A

Adhering junction

Option A is correct because adhering junctions provide strong mechanical attachments between cells.

29 Easy

29 of 107

Understanding +4 | -1

Gizzard in earthworm help in

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Correct option: C

Crushing or grinding food

Option C (Crushing or grinding food) is correct because the gizzard in earthworms is a muscular organ that helps in breaking down food particles by grinding them against ingested soil.

30 Easy

30 of 107

Analyzing +4 | -1

Select the mis-match

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Correct option: D

Skeletal muscle fibres – Contains myofibrils and single central nucleus

Option D (Skeletal muscle fibres – Contains myofibrils and single central nucleus) is the mismatch because skeletal muscle fibers are multinucleated, not single central nucleus.

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