Biology chapter 12 Transport in organisms Past paper solved mcqs

 21. The cell sap is a solution of:

(a) Water

(b) Salts

(c) Sugars

(d) All above✅

22. The membrane of the vacuole is called:

(a) Cell membrane

(b) Vacuole membrane

(c) Tonoplast✅

(d) Nuclear membrane

23. Wilting occurs as a result of:

(a) Plasmolysis

(b) Loss of turgidity

(c) Both (a) and (b)✅

(d) None above

24. In plants vascular styem is present in

(a) Flowering plants✅

(b) None-flowering plants

(c) Bryophytes

(d) All plants

25. The rising of soil solution from the bottom to the top of a plant through xylum is called

(a) Rising

(b) Ascent of sap✅

(c) Descent of safe

(d) Ascent of safe

26. Dixon and Jolly presented the theory.

(a) Cohesion tension theory✅

(b) Cell theory

(c) Both (a) & (b)

(d) None

27. One of the causes of ascent of sap is:

(a) Transpiration pull✅

(b) Osmosis

(c) Diffusion

(d) All above

28. The suction force developed as a result of transpiration is called

(a) Function

(b) Transpiration pull✅

(c) Respiration pull

(d) Transportation pull

29. The food manufactured in leaves is transported in the phloem for:

(a) Use

(b) Execution

(c) Storage

(d) (a), and (c)✅

30. Leaves make the food in the form of:

(a) Proteins

(b) Lipids

(c) Carbohydrates✅

(d) All above

31. Food in plant is stored in the form of.

(a) Glucose

(b) Sucrose

(c) Starch✅

(d) All above

32. Plants store carbohydrates in:

(a) Roots

(b) Stem

(c) Leaves

(d) All above✅

33. Fruits and seeds stores:

(a) Carbohydrates

(b) Proteins

(c) Fats

(d) All above✅

34. The evaporation of water from the aerial parts of a plant mainly through stomata is called:

(a) Expiration

(b) Transpiration✅

(c) Execution

(d) All above

35. The small pores distributed over the surface of leaves and young stem is called

(a) Poles

(b) Stomatas✅

(c) Adidas

(d) Patatas

36. Each pole of stomata is guarded by two cells called:

(a) Stomata cells

(b) Guard cells✅

(c) Pole cells

(d) All above

37. 90% loss of water in transpiration occur through

(a) Lenticels

(b) Stomata✅

(c) Cell surfaces

(d) Diffusion

38. 5-10% transpiration occur through:

(a) Cuticles or lenticels✅

(b) Stomata

(c) Surfaces

(d) Stem

39. Following are factors affecting transpiration,

(a) Light

(b) temperature

(c) Humidity

(d) All above✅

40. The drooping of leaves and greens tender stem of a plant as a result of excessive evaporation is called:

(a) Wilting✅

(b) Welding

(c) Melting

(d) Drying

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