Structural Organisation in Animals

Q. The structure in earthworm which serves as a wedge to force open cracks in the soil is the

1. peristomium
2. setae
3. clitellum
4. prostomium

Q. In which of the following organisms all the functions are performed by a single cell

1. Specification

2. Limitation

3. Minimalism

4. Attribution

Q.

The importance of structural organisation in animals is to facilitate _____.

1. Division of labour

2. Multicellularity

3. Body complexion

4. Simplification

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.

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

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

Q. The difference between male & female genital aperture of earthworm is_________

1. Male genital aperture opens dossally & female genital pore opens ventrally
2. Male genetal aperture is paired, female genital aperture is single
3. both a & b
4. Male genital aperture is paired, present in 14th segment & female genital aperture is single, present in 18th segment

Q.

Subneural blood vessel in an earthworm bifurcates and then continues as _________

1. supra oesophageal

2. dossal blood vessel

3. commissural blood vessel

4. lateral oesophageal

Q. Bidder's canal is present in_________

1. testis of frog
2. kidney of frog
3. cloaca of frog
4. None of these

Q. Multicellularity in organisms, brought about in the cells leading to increased efficiency.

1. simplicity
2. division of labour
3. functionality
4. structure

Q. Which of the following options doesn’t have a sensory organ with respect to Rana tigrina?

1. Sensory papillae and taste buds
2. Eyes and nasal epithelium
3. Tympanum with internal ears
4. Cloaca and external ear