MCQ
Mollusca is differentiated from other by
- ABilateral symmetry and external skeleton
- BMantle and gill
- CShell and nonsegmented body
- ✓Mantle and nonsegmented body.
✓
Answer
Correct option: D.
Mantle and nonsegmented body.
d
(d)The body is surrounded by a secretory fold of body wall called mantle or pallium and nonsegmented body etc. is the characteristic feature of mollusca.
(d)The body is surrounded by a secretory fold of body wall called mantle or pallium and nonsegmented body etc. is the characteristic feature of mollusca.
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(ii) Each limb and leg is made of 30 bones.
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(i) The bones of the limbs along with their girdles constitute the appendicular skeleton.
(ii) Each limb and leg is made of 30 bones.
(iii) The scapula has a acromion process.
(iv) In pectoral girdle acetabulum cavity present which articulates with the head of the humerus to form the shoulder joint.
(v) Pelvic girdle consists of two coxal bones and it has a cavity called glenoid to which the thigh bone articulates.
(vi) Fibrous joints shown by the flat skull bones in the form of sutures, to form the cranium.
(vii) Cartilaginous joints, permits limited movements.
(viii) Between carpal and metacarpal of thumb saddle joint is present and between the carpals gliding joint is present.
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