Biology Questions and Answers for Competitive Exam

Selective Biology Questions and Answers:

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31. Trees at seashore do not have annual rings because

(a) There is climatic variation

(b) There is no marked climatic variation

(c) There is enough moisture in the atmosphere

(d) Soil is sandy

32. Grafting is not possible in monocots because they

(a) Have scattered vascular bundles

(b) Have parallel venation

(c) Are herbaceous

(d) Lack cambium

33. A tissue is a

(a) A group of separate organs that are co ordinate in their activities

(b) Group of similar cells tat function together in a specialized activity

(c) Layer of cells surrounding an organ

(d) Sheet of cells, one layer thick

34. Which type of tissue forms the inner lining of a blood vessel?

(a) Epithelial

(b) Connective

(c) Muscle

(d) Nervous

35. Epithelial tissue with thin flat cells appearing like packed tiles occur on

(a) Inner lining of stomach

(b) Inner lining of fallopian tube

(c) Inner lining of cheek

(d) Outer surface of ovary

36. The actively dividing layer of columnar cells in the epidermis of man is called as the

(a) Stratum granulosum

(b) Stratum lucidum

(c) Stratum malpighi

(d) Stratum comeum

37. Horns of most mammals are composed of

(a) Bones

(b) Cartilage

(c) Keratin

(d) Chitin

38. Mammary glands are modified

(a) Sebaceous gland

(b) Sweat gland

(c) Oil gland

(d) Lymph gland

39. Which of the following tissue has matrix, which is the source of its structural and functional

performances?

(a) Connective tissue

(b) Muscular tissue

(c) Nervous tissue

(d) Epithelial tissue

40. Ground substances and fibers in the connective tissue are the secretory products of

(a) Mast cells

(b) Reticular cells

(c) Plasma cells

(d) Fibroblasts

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