Structural Organisation in Animals Test

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Structural Organisation in Animals Test - 85

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following muscles are striated and branched?

A
Skeletal muscles

B
Smooth muscles

C
Cardiac muscles

D
Both A and C

Solution

The cardiac muscles (heart muscles) are involuntary striated muscles that are found in the walls of the heart. The heart is a pumping organ that needs to work tirelessly. To ensure this pumping efficiently, the cardiac muscle cells are bundled together giving the muscle a branched appearance. These bundled cells thus allow quick transmission of electrical signals which aid in efficient contraction and relaxation of the cardiac muscles. This in turn helps in the efficient pumping of the heart.
So, the correct answer is option C.
Question 2
1 / -0

Which one of the following helps in keeping the body warm?

A
Sweat glands

B
Adipose tissue

C
Skin

D
Hair

Solution

Fat-storing adipose tissue is found below the skin and between internal organs. The cells of this tissue are filled with fat globules and therefore, it acts as an insulator that keeps the body warm.
Hence the correct option is B.
Question 3
1 / -0

Nictitating membrane is an example of

A
Analogous structures

B
Homologous structures

C
Vestigeal structures

D
All

Solution

Nictitating membrane (Third eyelid or Plica semilunaris). It is thin, transparent and freely movable fold which is used to clean cornea in frog, pigeon, apes etc.
Question 4
1 / -0

The female genital pore of Pheretima posthuma located upon the .......... segment.

A
$$14^{th}$$

B
$$16^{th}$$

C
$$18^{th}$$

D
$$15^{th}$$

Solution

The female genital pore of Pheretima posthuma located upon the 14th segment. The body is made of 100 to 120 segments, of which the first segment is divided into an anterior prostomium and posterior ring-like peristomium. Segments 14-16 form a girdle-like thick band of glandular tissue called as clitellum that secretes mucus, albumen and cocoon inside, which eggs are laid.
Question 5
1 / -0

Arrange the ganglia of autonomous nervous system of cockroach in correct sequence from anterior to posterior end.

A
Frontal ganglion, Hypocerebral ganglion, Visceral ganglion, Proventricular ganglion

B
Proventricular ganglion, Frontal ganglion, Hypocerebral ganglion, Visceral ganglion

C
Hypocerebral ganglion, Visceral ganglion, Frontal ganglion, Proventricular ganglion

D
Visceral ganglion, Proventricular ganglion, Frontal ganglion, Hypocerebral ganglion
Solution
The autonomous system includes 4 nerve ganglia and nerves which connect them and supply to visceral organs. The nerve ganglia in order from anterior to posterior end are as:
1. Frontal ganglion: It is present on pharynx, just in front of the brain.
2. Occipital ganglion or hypocerebral ganglion: It is present behind the brain and above the oesophagus.
3. Visceral ganglion: It is present on the wall of the crop
4. Proventricular ganglion: It is present on the gizzard.
  Thus, the correct answer is option (A).
Question 6
1 / -0

The generation of excitation-contraction coupling involves all the following events except

A
Generation of end-plate potential

B
Release of calcium from troponin

C
Formation of cross-linkages between actin and myosin

D
Hydrolysis of ATP to ADP

Solution

Excitation-contraction coupling is a process that relates to the electrical excitation through generation of force and contraction in the skeletal muscles. The central process that brings about the excitation-contraction is calcium mobilization. The process involves inward flux of extracellular calcium ions through L-type calcium channels, calcium induced calcium release through sacroplasmic reticulum, with the increase in concentration of intracellular calcium, the calcium ions get bound to protein troponin and myosin binds to actin.
Hence B is the correct option.
Question 7
1 / -0

Which of the following cells in earthworm play a role similar to liver in vertebrates?

A
Amoebocytes

B
Mucocytes

C
Chloragogen cells

D
Epidermal cells

Solution

Chloragogen cells are present in the family Annelida. Chlorogogen cells are excretory in function. The chlorogogen cells take up excretory matter from the blood capillaries of the gut and from the coelomic fluid of the coelom. They also store glycogen and fat. So, these cells are analogous to the liver of vertebrates.
Question 8
1 / -0

Which one of the following tissues gives rise to nervous system and is formed during gastrulation phase of embryonic development?

A
Archenteron

B
Blastopore

C
Ectoderm

D
Endoderm

E
Mesoderm

Solution

Ectoderm is the primary germ layer formed during gastrulation phase of embryonic development. The ectoderm differentiates to form the nervous system (spine, peripheral nerves and brain), the epidermis (the outer part of integument) as well as the lining of organs.

Question 9

1 / -0

Match the correct pain in List-I and List-II with reference to Pheretima.

List-I	List-II
(A) Pharyngeal Nephridia	(I)14th segment
(B) Stomach	(II)18th segment
(C) Anterior loops	(III)9th to 14th segments
(D) Male genital apertures	(IV) 4th, 5th and 6th segments
	(V)10th and 11th segments

A- (IV), B- (III), C- (V), D- (II)

A- (V), B- (IV), C- (III), D- (I)

A- (III), B- (IV), C- (V), D- (II)

A- (IV), B- (I), C- (V), D- (II)

Solution

The pharyngeal nephridia are attached to the either side if the fourth, fifth and sixth segments and contains blood gland. The stomach lies in segments 9-14. Anterior loops are two pairs of blood vessels connecting lateral oesophageal vessels to the supra-oesophageal vessel. The blood flows upwards in the vessels. They are located in the 10th and 11th segments. On the ventrolateral sides of the 18th segment, a pair of male genital pores is present.

Question 10
1 / -0

Vermicompost produced by earthworm contains nitrogen(N) and phosporous in this ratio.

A
$$30\%$$ N and $$2.04\%$$P

B
$$20\%$$ N and $$1.04\%$$P

C
$$10\%$$N and $$3.04\%$$P

D
$$60\%$$N and $$5.04\%$$P

Solution

Earthworms are traditionally called as friends of farmers because they increase aeration and make available nitrogen and potassium to plants in easily usable form. Earthworms have been used in vermicomposting. In order to enhance the growth of the plant and fertility of soil must have a particular nitrogen and phosphorous ratio. Over fertilization of nitrogen in the vermicompost can lead to nitrogen burn. Nitrogen burn is the overfertilization of nitrogen leading to scorching of leaves. Thus, 30% nitrogen and 2.04% of phosphorous is the ratio of vermicompost produced by earthworm. Thus, the correct answer is option A.

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Structural Organisation in Animals Test - 85

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Structural Organisation in Animals Test - 85

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Question 1

Skeletal muscles

Smooth muscles

Cardiac muscles

Both A and C

Solution

Question 2

Sweat glands

Adipose tissue

Skin

Hair

Solution

Question 3

Analogous structures

Homologous structures

Vestigeal structures

All

Solution

Question 4

$$14^{th}$$

$$16^{th}$$

$$18^{th}$$

$$15^{th}$$

Solution

Question 5

Frontal ganglion, Hypocerebral ganglion, Visceral ganglion, Proventricular ganglion

Proventricular ganglion, Frontal ganglion, Hypocerebral ganglion, Visceral ganglion

Hypocerebral ganglion, Visceral ganglion, Frontal ganglion, Proventricular ganglion

Visceral ganglion, Proventricular ganglion, Frontal ganglion, Hypocerebral ganglion

Solution

Question 6

Generation of end-plate potential

Release of calcium from troponin

Formation of cross-linkages between actin and myosin

Hydrolysis of ATP to ADP

Solution

Question 7

Amoebocytes

Mucocytes

Chloragogen cells

Epidermal cells

Solution

Question 8

Archenteron

Blastopore

Ectoderm

Endoderm

Mesoderm

Solution

Question 9

A- (IV), B- (III), C- (V), D- (II)

A- (V), B- (IV), C- (III), D- (I)

A- (III), B- (IV), C- (V), D- (II)

A- (IV), B- (I), C- (V), D- (II)

Solution

Question 10

$$30\%$$ N and $$2.04\%$$P

$$20\%$$ N and $$1.04\%$$P

$$10\%$$N and $$3.04\%$$P

$$60\%$$N and $$5.04\%$$P

Solution

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