12th class (Fsc) Biology unit 2 MCQs
26. The word tropic is derived from Greek word “ Tropos” meaning:
a. Attractive
b. Sticky
c. Growth
d. Turn
27. Positive gravitropism of root is due to:
a. Abscisic acid
b. Auxin
c. Ethene
d. Gibberellin
28. Action of the venus fly trap is:
a. Haptonasty
b. Nyctinasty
c. Thermonasty
d. Photonasty
29. The hypea of fungi are:
a. Chemotropic
b. Phototactic
c. Geotropic
d. Chemotactic
30. The type of nastic movement, which occurs in response to contact is called:
a. Thermonasty
b. Heptonastic
c. Nyctinasty
d. Photonasty
31. Hyponasty is caused by:
a. Gibberellins
b. Auxin
c. Abscisic acid
d. Cytokinine
32. Molting occurs in arthropods at the:
a. Both stages
b. Immature stage
c. Do not undergo molting
d. Mature stage
33. Which of the following has hydrostatic skeleton?
a. Sea anemone
b. Man
c. Fish
d. An insect
34. Bone forming cells are known as:
a. Osteoclasts
b. Osteoblasts
c. Chondroblasts
d. Osteocytes
35. Collagen fibres of bone are hardened by the deposit of:
a. Sodium carbonate
b. Calcium phosphate
c. Calcium carbonate
d. Sodium phosphate
36. Which bone provide attachment site for muscle?
a. Soft bone
b. Compact bone
c. Cartilage
d. Spongy bone
37. The living cells of cartilage are called:
a. Nematocytes
b. Cridocytes
c. Blastocytes
d. Chondrocytes
38. Mature bone cells are called:
a. Osteoclasts
b. Osteoblasts
c. Chondrocytes
d. Osteocytes
39. A hardened outer surface to which internal muscles can be attached is:
a. Exoskeleton
b. Endoskeleton
c. Axial skeleton
d. Hydrostatic skeleton
40. Which bone provide attachment site for:
a. Soft bone
b. Compact bone
c. Cartilage
d. Spongy bone
41. The process of moulting is controlled by the nervous system and a hormone called:
a. Ecdysone
b. Aldosterone
c. Oxytocin
d. Androgen
42. Which of the following is a bone of axial skeleton?
a. Pelvis
b. Rib
c. Femur
d. Shoulder girdle
43. Vertebral column includes:
a. Cervical, thoracic and lumber vertebrae
b. Sacrum
c. Coccyx
d. All of these
44. In mammal the number of cervical vertebrae are:
a. Eleven
b. No definite number
c. Varies with the size of neck
d. Seven
45. Brain is protected by:
a. Orbits
b. Cranium
c. Skull
d. All of these
46. Sacrum is formed by the fusion of interior:
a. Four bones
b. Two bones
c. Five bones
d. Three bones
47. The lower two pairs of ribs in human are called:
a. Floating ribs
b. Free ribs
c. Former ribs
d. Fix ribs
48. Seven vertebrae lie in the the neck region called:
a. Pelvic region
b. Lumbar region
c. Cervical region
d. Thoracic region
49. Neck region is called:
a. Pelvic region
b. Lumber region
c. Cervical region
d. Thoracic region
50. The number of cervical vertebrate are:
a. 33
b. 07
c. 22
d. 12