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NEET • BIOLOGY • STRUCTURAL ORGANISATION IN ANIMALS
Structural organisation in animals practice · Mixed difficulty
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61
Easy
61 of 307
Understanding
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Assertion: Development of earthworm is direct type
Reason: There is no larva stage in development
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
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.
62
Medium
62 of 307
Remembering
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Which of the following is not a connective tissue?
View answer and explanation
Correct option: A
Neuroglia
Option A (Neuroglia) is correct because neuroglia are supporting cells of the nervous system and are classified as neural tissue, not connective tissue.
63
Medium
63 of 307
Understanding
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General function of gland is to
View answer and explanation
Correct option: C
produce and secrete specialised compounds to control and maintain different body functions.
Option C (produce and secrete specialised compounds to control and maintain different body functions) is correct because glands are specialized for producing and secreting substances that regulate bodily functions.
64
Easy
64 of 307
Understanding
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Which of the following statements wrongly represents the nature of smooth muscle?
View answer and explanation
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.
65
Medium
65 of 307
Analyzing
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Choose the odd one w.r.t the male reproductive system of cockroach:-
View answer and explanation
Correct option: B
Spermatheca
Option B (Spermatheca) is the odd one because it is a part of the female reproductive system, while the others are part of the male reproductive system.
66
Medium
66 of 307
Analyzing
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Choose the odd one w.r.t. compound epithelium
View answer and explanation
Correct option: C
They cover the dry surface of skin and never found on moist surfaces of the body
Option C (They cover the dry surface of skin and never found on moist surfaces of the body) is correct because compound epithelium is found on both dry and moist surfaces.
67
Medium
67 of 307
Remembering
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Blood vascular system of earthworm is
View answer and explanation
Correct option: D
Closed type with Hb in plasma
Option D (Closed type with Hb in plasma) is correct because earthworms have a closed circulatory system where hemoglobin is dissolved in the plasma, not contained within red blood cells.
68
Easy
68 of 307
Understanding
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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.
69
Easy
69 of 307
Remembering
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The excitable unit of neural system is
View answer and explanation
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.
70
Medium
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Understanding
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Segregate the given set of statements regarding frog into true and false category
I) Frogs do not have a lymphatic system
II)Frogs are ammonotelic animals
III)Hindlimbs of frog ends in five digits and forelimbs ends in four digits
IV) Female frog contains sound producing vocal sacs which are absent in male frog
I) Frogs do not have a lymphatic system
II)Frogs are ammonotelic animals
III)Hindlimbs of frog ends in five digits and forelimbs ends in four digits
IV) Female frog contains sound producing vocal sacs which are absent in male frog
View answer and explanation
Correct option: D
F, F, T, F
Option D (F, F, T, F) is correct because frogs have a lymphatic system, are ureotelic, hindlimbs have five digits, and male frogs have vocal sacs.
71
Hard
71 of 307
Remembering
+4 | -1
Tissue that contains fat globules is known as:
View answer and explanation
Correct option: B
adipose tissue
Option B (adipose tissue) is correct because adipose tissue is the type of connective tissue primarily composed of fat cells (adipocytes).
72
Medium
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Remembering
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Wall of blood capillary is formed of
View answer and explanation
Correct option: C
Endothelial cells
Option C (Endothelial cells) is correct because endothelial cells form the inner lining of blood vessels, including capillaries.
73
Medium
73 of 307
Understanding
+4 | -1
What is true with regards to cell-cell junctions?
View answer and explanation
Correct option: D
Sometimes gap junctions connect cytoplasm of
adjoining cells for rapid transfer of big molecules
adjoining cells for rapid transfer of big molecules
Option D (Sometimes gap junctions connect cytoplasm of adjoining cells for rapid transfer of big molecules) is correct because gap junctions facilitate direct communication between cells.
74
Medium
74 of 307
Understanding
+4 | -1
The function of typhlosole in earthworm
View answer and explanation
Correct option: C
Increase absorptive area of intestinal epithelium
Option C (Increase absorptive area of intestinal epithelium) is correct because the typhlosole is an internal fold in the intestine of the earthworm that increases the surface area for nutrient absorption.
75
Hard
75 of 307
Remembering
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What is sprain?
View answer and explanation
Correct option: C
More pulling of ligament
Option C (More pulling of ligament) is correct because a sprain is defined as the overstretching or tearing of ligaments, which connect bones to each other at a joint.
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76
Easy
76 of 307
Remembering
+4 | -1
The highly degraded organic matter rich in nitrogen and potassium in particular resulting from the activity of earthworms, is called
View answer and explanation
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.
77
Hard
77 of 307
Understanding
+4 | -1
The function of gap junctions is to
View answer and explanation
Correct option: B
Facilitate the cells to communicate with each other by connecting the cytoplasm of adjoining cells, for rapid transfer of ions, small molecules etc.
Option B is correct because gap junctions facilitate communication between cells by connecting their cytoplasm for rapid transfer of ions and small molecules.
78
Hard
78 of 307
Remembering
+4 | -1
Which type of epithelium is present in Vas deferentia?
View answer and explanation
Correct option: C
Pseudo Stratified Columnar epithelium
Option C (Pseudo Stratified Columnar epithelium) is correct because vas deferentia are lined with pseudo stratified columnar epithelium, often with stereocilia.
79
Hard
79 of 307
Understanding
+4 | -1
Assertion (A): When one cell of cardiac muscle receives a signal to contract, its neighbour cells are also stimulated to contract.
Reason (R): There is presence of communicating junctions (intercalated discs) at some fusion points between muscle fibres.
In light of above statements, choose the correct option.
Reason (R): There is presence of communicating junctions (intercalated discs) at some fusion points between muscle fibres.
In light of above statements, choose the correct option.
View answer and explanation
Correct option: A
Both (A) and (R) are true and (R) is the correct explanation of (A)
Option A (Both (A) and (R) are true and (R) is the correct explanation of (A)) is correct because intercalated discs facilitate rapid signal transmission in cardiac muscle.
80
Medium
80 of 307
Remembering
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Each segment of the cockroach exoskeleton has hardened plates called
View answer and explanation
Correct option: A
Sclerites
Option A (Sclerites) is correct because each segment of the cockroach exoskeleton has hardened plates called sclerites, which provide protection and support.
81
Medium
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Understanding
+4 | -1
Which of the following statement is incorrect w.r.t reproductive system and development of cockroach ?
View answer and explanation
Correct option: D
Mushroom shaped gland is present in the 4th to 6th abdominal segments of male cockroach
Option D is correct because the mushroom-shaped gland in male cockroaches is located in the 6th-7th abdominal segments, not the 4th-6th.
82
Medium
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Remembering
+4 | -1
The fibroblasts present in the loose connective tissue produce fibres made up of
View answer and explanation
Correct option: B
Collagen
Option B (Collagen) is correct because fibroblasts in loose connective tissue produce collagen fibers, which provide strength and support to the tissue.
83
Easy
83 of 307
Remembering
+4 | -1
In frog, for the digestion of food, wall of the stomach secretes
View answer and explanation
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.
84
Medium
84 of 307
Remembering
+4 | -1
The major constituent of connective tissue is
View answer and explanation
Correct option: D
Collagen
Option D (Collagen) is correct because collagen is the most abundant protein in the body and a major structural component of connective tissues.
85
Medium
85 of 307
Understanding
+4 | -1
Choose the correct option, pairing the principal cell with the tissue
View answer and explanation
Correct option: B
Fibroblasts – Areoloar tissue
Option B (Fibroblasts – Areoloar tissue) is correct because fibroblasts are the primary cells found in areolar tissue, responsible for producing the extracellular matrix.
86
Medium
86 of 307
Remembering
+4 | -1
The type of epithelial cells which line inner surface of fallopian tubes, bronchioles and small bronchi are known as
View answer and explanation
Correct option: C
Ciliated epithelium
Option C (Ciliated epithelium) is correct because the fallopian tubes, bronchioles, and small bronchi are lined with ciliated epithelium to move substances.
87
Easy
87 of 307
Remembering
+4 | -1
A type of cell junction which primarily helps to cement neighbouring cells to keep them together is called
View answer and explanation
Correct option: A
Adhering junction
Option A is correct because adhering junctions provide strong mechanical attachments between cells.
88
Hard
88 of 307
Remembering
+4 | -1
Silicates consumed along with food by Pheretima and excreted by–
View answer and explanation
Correct option: B
chloragogen cells
Option B (chloragogen cells) is correct because these cells in earthworms are responsible for storing and excreting waste products, including silicates.
89
Easy
89 of 307
Understanding
+4 | -1
Gizzard in earthworm help in
View answer and explanation
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.
90
Easy
90 of 307
Analyzing
+4 | -1
Select the mis-match
View answer and explanation
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.
Revision notes and key takeaways
Review STRUCTURAL ORGANISATION IN ANIMALS in your textbook or class notes, then use this set to check your understanding.
Showing 61-90 of 307 questions