Structural Organisation in Animals

NEET Biology · 93 questions · Page 5 of 10 · Click an option or "Show Solution" to reveal answer

Q41

Select the correct option with respect to cockroaches:

A Nervous system comprises of a dorsal nerve cord and ten pairs of ganglion

B The fore wings are tegmina which are used in flight

C Malpighian tubules convert nitrogenous wastes into urea

D Males bear anal styles not present in females

Correct Answer

Option D

Solution

Males have paired anal styles on 9th abdominal sternite absent in females.

Cockroach is uricotelic.

Tegmina are not used in flight (hindwings are).

Q42

Skeletal muscle shows striations and is closely attached with the bones of the limbs - this correctly identifies:

A Smooth muscles, show branching, found in walls of the heart

B Striated muscles, tapering at both ends, attached with bones of the ribs

C Skeletal muscle, shows striations and closely attached with bones of the limbs

D Cardiac muscles, unbranched muscles, found in walls of the heart

Correct Answer

Option C

Solution

Skeletal muscles are striated, voluntary and attached to bones by tendons to help in movement of skeleton.

Q43

What external changes are visible after the last moult of a cockroach nymph?

A Both fore wings and hind wings develop

B Mandibles become harder

C Labium develops

D Anal cerci develop

Correct Answer

Option A

Solution

The nymph grows by moulting about 13 times.

The last nymphal stage has wingpads; adult cockroaches develop both fore and hind wings.

Q44

In a diagrammatic sketch of connective tissue: A=Macrophage, B=Fibroblast, C=Collagen fibres, D=Mast cell

A A-Mast cell, B-Collagen fibres, C-Fibroblast, D-Macrophage

B A-Mast cell, B-Macrophage, C-Fibroblast, D-Collagen fibres

C A-Macrophage, B-Fibroblast, C-Collagen fibres, D-Mast cell

D A-Macrophage, B-Collagen fibres, C-Fibroblast, D-Mast cell

Correct Answer

Option C

Solution

Connective tissue contains macrophages, fibroblasts, collagen fibres and mast cells in a jelly-like ground substance.

Q45

The supportive skeletal structures in the human external ears and in the nose tip are examples of

A Ligament

B Areolar tissue

C Cartilage

D Bone

Correct Answer

Option C

Solution

Cartilage is a type of connective tissue present in external ears and nose tip of humans.

Q46

Which correctly identifies tissue with its location and function? (A) Columnar epithelium-Nephron-Secretion, (B) Collagen fibres-Cartilage-Attach muscles to bones, (C) Glandular epithelium-Intestine-Secretion, (D) Smooth muscle-Heart-Heart contraction

A (A) Columnar epithelium, Nephron, Secretion and absorption

B (C) Collagen fibres, Cartilage, Attach skeletal muscles to bones

C (B) Glandular epithelium, Intestine, Secretion

D (D) Smooth muscle tissue, Heart, Heart contraction

Correct Answer

Option C

Solution

Glandular epithelium is found in intestinal lining and functions in secretion.

Q47

Select the correct statement with respect to Periplaneta americana

A Males bear a pair of short thread like anal styles

B There are 16 very long Malpighian tubules present at the junctions of midgut and hindgut

C Nervous system located dorsally, consists of segmentally arranged ganglia joined by a pair of longitudinal connective

D Grinding of food is carried out only by the mouth parts

Correct Answer

Option A

Solution

Male cockroaches bear a pair of short thread-like anal styles absent in females.

The nervous system is ventral, not dorsal.

Q48

Compared to those of humans, the erythrocytes in frog are

A Without nucleus but with haemoglobin

B Very much smaller and fewer

C Nucleated and with haemoglobin

D Nucleated and without haemoglobin

Correct Answer

Option C

Solution

Frog RBCs are large, oval, biconvex, nucleated cells containing haemoglobin.

Q49

The cells lining the blood vessels belong to the category of

A Squamous epithelium

B Columnar epithelium

C Connective tissue

D Smooth muscle tissue

Correct Answer

Option A

Solution

Simple squamous epithelium (called endothelium in blood vessels) lines blood vessels, lymph vessels and heart.

Q50

Frogs differ from humans in possessing

A hepatic portal system

B paired cerebral hemispheres

C nucleated red blood cells

D thyroid as well as parathyroid

Correct Answer

Option C

Solution

Humans have enucleated RBCs in mature state. Frog blood has nucleated RBCs.

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