Structural Organisation in Animals Test

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Structural Organisation in Animals Test - 96

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is correct statement for the neuroglial cells?

A
Neuroglial makes up one half of the volume of the neural tissue in our brain.

B
It protects and supports the neurons.

C
It is of two types, macroglia and microglia.

D
All the given options are correct
Solution
- Neuroglial cells are specialised cells found in the brain and spinal cord supporting the neurons and their fibres.
- Half of all the brain cells are neuroglial cells. There are two types of neuroglial cells macroglia and microglia.
- The macroglia are large glial cells, and form from the ectoderm of the embryo. Microglia cells are small glial cells which are formed from the mesoderm of the embryo.
So, the correct answer is option D.
Question 2
1 / -0

Which of the following is a flexible membrane joining dorsal and ventral sclerites of a cockroach?

A
Nictitating membrane

B
Arthrodial membrane

C
Synovial membrane

D
Occipetal membrane

Solution

The dorsally located terga and ventrally situated sterna are joined to each other by a thin and flexible articular membrane called arthrodial membrane. It occurrs between skeletal elements and helps in relative movement. Hence, it is also known as intersegmental membrane.
So, the correct option is 'Arthroidal membrane'.
Question 3
1 / -0

Read the statement with regard to frog. Which of the statement is/are correct and incorrect?

(i) The medulla oblongata passes out through foramen of Monro and continues into the spinal cord.
(ii) Vasa efferentia are 10-12 in number that arises from testes
(iii) Ovaries have no functional connection with kidneys
(iv) Frogs are uricotelic

A
Statements (i), (ii) and (iii) are correct while statement (iv) is incorrect

B
Statements (ii), (ii) are correct while statement (i) and (iv) is incorrect

C
Statements (ii), (iii) and (iv) are correct while statement (i) is incorrect

D
None of these

Solution

In frog, the medulla oblongata passes out through foramen magnum and continues into spinal cord. Frogs are ureotelic.
Question 4
1 / -0

Which of the following mouth part of cockroach is found in a pair and performs mastication?

A

B

C

D

Solution

The correct answer is C.
Anterior end of the head of a cockroach bear appendages forming biting and chewing type of mouth parts. The mouth parts consisting of a labrum, a pair of mandibles, and a pair of maxillae and labium. The function of mandibles is to grasp, crush, chew the food or to defend against predators.
Question 5
1 / -0

Which of the following statement is incorrect about the circulatory system of earthworm?

A
Pheretima represents a closed type of blood vascular system.

B
Blood glands are present in $$4^{th}, 5^{th}$$ and $$6^{th}$$ segments, they produce blood cells and haemoglobin dissolved in plasma.

C
There are four pairs of hearts in earthworm present in $$7^{th}$$, $$9^{th}$$, $$12^{th}$$, $$13^{th}$$ segments.

D
In dorsal vessel, blood flows in forward direction and is without valves.
Solution
- The blood vascular system of Pheretima is of closed type. It consists of the blood vessels, hearts, loops, capillaries, and blood glands.
- Blood glands are present on the 4th,5th and 6th segments. They produce blood cells and haemoglobin which is dissolved in blood plasma. Blood cells are phagocytic in nature.
- There are four pairs of valvular, muscular and pulsatile hearts situated in the 7th, 9th, 12th and 13th segments. Out of these four pairs, the two anterior ones of the 7th and 9th are called lateral hearts, while those of the 12th and 13th segments are called latero-oesophagal hearts.
- Blood flows toward the anterior end of the earthworm in the dorsal vessel. From the dorsal vessel, it enters the heart (aortic arches), which pump it into the ventral vessel. Blood flows posteriorly in the ventral vessel. Small tubes connect the dorsal and ventral vessels throughout the earthworm. The dorsal blood vessel has valves which prevent the backflow of blood.
So, the correct answer is option D.
Question 6
1 / -0

Similarity between crop and gizzard of the gut of cockroach lies in?

A
Their origin

B
The thickness of their walls

C
Their circular lining

D
Their function

Solution

Crop and gizzard are ectodermal in origin. The crop is the dilated distal part of oesophagus acting as a food reservoir. The gizzard is the posterior part of the foregut and is musculated.
So, the correct answer is (a).
Question 7
1 / -0

Select the correct statements with reference to pheretima (excretory system)
A) Nephridia help in excretion and osmoregulation
B) Septal nephridia collects the wastes from coelomic fluid with the help of nephrostomes
C) Integumentary nephridia discharge waste materials to the outer body surface through the nephridiopores
D) Septal nephridia and pharyngeal nephridia discharge wastes into luman of gut.

A
$$A,B,C$$

B
$$B,C,D$$

C
$$A,C,D$$

D
$$A,B,C,D$$

Solution

Excretion in earthworm is performed by long, thin and coiled tubules known as nephridia.
The septal nephridia are located on both sides of the septa--thread-like structures that hold the skin to organs below in rows of forty or fifty individual nephridia. They appear after the 15th segment, and they empty into a pair of excretory ducts that lead to the main gut cavity.
Pharyngeal nephridia discharge waste products directly into the buccal cavity and pharynx. Hence, statement D is incorrect.
So, the correct option is 'A, B, C'.
Question 8
1 / -0

Epithelium covering the tongue is:

A
Pseudostratified

B
Squamous keratinised

C
Squamous non-keratinised

D
Simple cuboidal
Solution
- The surface of the tongue is covered by stratified squamous epithelium, modified on the upper surface into filiform papillae.
- Taste buds are oral clusters of elongated cells that extended across the thickness of the epithelium, from the lamina propria to the taste pore at the surface. There is not keratinisation of the tissue of the tongue.
- Thus, the correct answer is option C.
Question 9
1 / -0

The number of pairs of cranial nerves arising from the brain of frog is?

A
$$10$$

B
$$9$$

C
$$8$$

D
$$7$$

Solution

Frogs have ten pairs of cranial nerves. They arise from the brain and innervate to the different parts of the body. They may be sensory or motor in nature.
Thus, the correct answer is (A).
Question 10
1 / -0

Given is an animal followed by three terms or features. Choose the terms which does not match with the animal.
Earthworm.

A
Invertebrate

B
Annelida

C
Insecta

D
None of the above

Solution

Earthworm is an invertebrate and belongs to the annelid phylum whereas Insecta belongs to the arthropods phylum. These two phyla vary with each other by having different skeletons. Annelida contains hydrostatic skeleton whereas arthropods contain chitinous exoskeleton. Hence the correct answer is option C, Insecta.

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Structural Organisation in Animals Test - 96

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Structural Organisation in Animals Test - 96

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Question 1

Neuroglial makes up one half of the volume of the neural tissue in our brain.

It protects and supports the neurons.

It is of two types, macroglia and microglia.

All the given options are correct

Solution

Question 2

Nictitating membrane

Arthrodial membrane

Synovial membrane

Occipetal membrane

Solution

Question 3

Statements (i), (ii) and (iii) are correct while statement (iv) is incorrect

Statements (ii), (ii) are correct while statement (i) and (iv) is incorrect

Statements (ii), (iii) and (iv) are correct while statement (i) is incorrect

None of these

Solution

Question 4

Solution

Question 5

Pheretima represents a closed type of blood vascular system.

Blood glands are present in $$4^{th}, 5^{th}$$ and $$6^{th}$$ segments, they produce blood cells and haemoglobin dissolved in plasma.

There are four pairs of hearts in earthworm present in $$7^{th}$$, $$9^{th}$$, $$12^{th}$$, $$13^{th}$$ segments.

In dorsal vessel, blood flows in forward direction and is without valves.

Solution

Question 6

Their origin

The thickness of their walls

Their circular lining

Their function

Solution

Question 7

$$A,B,C$$

$$B,C,D$$

$$A,C,D$$

$$A,B,C,D$$

Solution

Question 8

Pseudostratified

Squamous keratinised

Squamous non-keratinised

Simple cuboidal

Solution

Question 9

$$10$$

$$9$$

$$8$$

$$7$$

Solution

Question 10

Invertebrate

Annelida

Insecta

None of the above

Solution

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