Structural Organisation in Animals

Q.

Write about compound eyes of cockroaches.

Q.

Following are the statements about prostomium of earthworm.

a) It serves as a covering for the mouth.

b) It helps to open cracks in the soil into which it can crawl.

c) It is one of the sensory structures.

d) It is the first body segment.

1. (a), (b) and (d) are correct

2. (a), (b) and (c) are correct

3. (a), (b), (c) and (d) are correct

4. (b) and (c) are correct

Q.

What is the function of the earthworms clitellum?

Q. Why does a cockroach have mosaic vision?

1. Presence of simple eyes
2. Presence of ommatidia
3. All of the above
4. Presence of antennae

Q.

Which of the following features is used to identify a male cockroach from a female cockroach?

1. Presence of anal cerci

2. Presence of a boat-shaped sternum on the 9th abdominal segment

3. Presence of caudal styles

4. Forewings with darker tegmina

Q.

What is the difference between direct and indirect development?

Q.

What is the bidders canal and what is its function?

Q. Typhlosole is present in which segment of the earthworm?

1. 24 to last
2. 25-35 segments only
3. 26 to last
4. 14-16 segments only

Q.

Select the correct route for the passage of sperms in male frogs.

1. Testes→ Bidder’s canal→ Kidney→ Vasa efferentia→ Urinogenital duct→ Cloaca

2. Testes→ Vasa efferentia→ Kidney→ Seminal Vesicle→ Urinogenital duct→ Cloaca

3. Testes→ Vasa efferentia→ Bidder’s canal→ Ureter→ Cloaca

4. Testes→ Vasa efferentia→ Kidney → Bidder’s canal→ Urinogenital duct→ Cloaca

Q. A frog's heart, when taken out of its body, continues to beat for sometime. Select the best option from the following statements.
(a) Frog is a poikilotherm.
(b) Frog does not have any coronary circulation.
(c) Heart is "myogenic" in nature.
(d) Heart is autoexcitable.

1. Only (c)
2. Only (d)
3. (a) and (b)
4. (c) and (d)

Q. The forebrain of a frog consists of

1. foramen magnum
2. optic lobes
3. medulla oblongata
4. unpaired diencephalon

Q. Which among the following statements is incorrect?

1. In female frogs, ovaries are located near kidneys and have functional connection with the kidneys
2. In male frogs, vasa efferentia arising from the testes enters the kidneys and opens into the Bidder’s canal.
3. In female frogs, oviducts open into the cloaca.
4. In male frogs, Bidder's canal communicates with urinogenital duct that comes out of the kidneys and opens into the cloaca.

Q. Spermathecae in earthworms are present in the segments

1. 6th-9th
2. 6th-10th
3. 6th-11th
4. 5th-8th

Q. In male frogs, the testes are attached to the kidney by a double fold of peritoneum called:

1. mesocolon
2. omentum
3. none of the above
4. mesorchium

Q. The table shows the functions of portal system in a frog. Choose the best option given below.

I.Portal System	II.Function
A) Renal portal system	Collects blood from all parts of the body
B) Renal portal system	Carries blood from hind limbs to kidneys
C) Hepatic portal system	Carries blood from liver to alimentary canal

1. A is incorrect
2. A and B are incorrect
3. A and C are incorrect
4. All are correct

Q. Earthworms are bisexual but still cross-fertilization is common in them. This is because

1. spermatozoa of different earthworms are different
2. spermatozoa and ova mature at different times in the same earthworm
3. ova from other earthworms may be larger
4. ova mature earlier than spermatozoa

Q. Tadpole of a frog is

1. ureotelic
2. uricotelic
3. ammonotelic
4. all of the above

Q. During aestivation and hibernation, frogs respire through ______

1. lungs
2. all of the above
3. skin
4. buccal cavity

Q.

The praying mantis is a good example of

1. Camouflage

2. Social insects

3. Mullerian mimicry

4. Warning colouration

Q. Earthworms are hermaphrodites and reproduce primarily by

1. self-fertilisation
2. cross-fertilisation
3. asexual reproduction
4. all of these

Q. The first body segment of earthworm is

1. protostome
2. none of the above
3. prostomium
4. peristomium

Q. In an earthworm, pharyngeal nephridia of 6th segment open into_______

1. oesophagus
2. Pharynx
3. exterior
4. buccal cavity

Q.

Define branchial respiration?

Q. The organ involved in exchange of gases during hibernation in frogs is

1. lungs
2. integument
3. both a and b
4. none of the above

Q. Match the senses with their respective sensory organs present in frog:

1. Touch	i. Tympanum
2. Taste	ii. Nasal epithelium
3. Smell	iii. Taste buds
4. Vision	iv. Simple eyes
5. Hearing	v. Sensory papillae

1. i-1, ii-2, iii-5, iv-3, v-4
2. i-2, ii-3, iii-5, iv-1, v-4
3. i-5, ii-3, iii-2, iv-4, v-1
4. i-1, ii-5, iii-4, iv-2, v-3

Q. The structure of the body in earthworms is maintained by

1. coelomic fluid
2. clitellum
3. setae
4. metameres

Q. Female genital aperture in earthworm is found in the

1. 10th segment
2. 12th segment
3. 14th segment
4. 18th segment

Q. In Pheretima, the excretory organs are segmentally arranged coiled tubules called nephridia. Identify the type of nephridia present in the 4th, 5th and the 6th segments.

1. Septal nephridia
2. Integumentary nephridia
3. All of the above
4. Pharyngeal nephridia

Q. Chloragogen cells are found in

1. blood of earthworm
2. blood of cockroach
3. coelomic fluid of earthworm
4. none of the above

Q. Assertion: Specialization of cells is advantageous for an organism.
Reason: It increases the operational efficiency of an organism.

1. Assertion is true but reason is false
2. Both the reason and assertion are true but the reason is not the correct explanation for the assertion
3. Both the reason and assertion are false
4. Both assertion and reason are true and the reason is the correct explanation for the assertion.