Topicwise Questions - Plants, Plant parts etc

26. Softening of mature ripe fruits is due to

  1. dissolution of middle lamella
  2. degradation of primary wall
  3. delignification
  4. removal of suberin deposits in the cell wall

27. Which part of saffron plant is used to obtain the spice ‘saffron’?

  1. Dry stigma
  2. Leaves
  3. Fruits
  4. Petals

28. Which one of the following processes takes place in lakes during eutrophication?

  1. Rapid destruction of algal growth
  2. Excessive availability of dissolved oxygen
  3. Loss of dissolved nutrients from water
  4. Excessive entry of nutrients into water

29. Which of the following organelles of a cell is/are involved in photosynthesis?

  1. Chloroplast
  2. Mitochondrion
  3. Endoplasmic reticulum
  4. Golgi bodies

30. The chief function of stilt root is to provide

  1. Aeration
  2. Nutrition
  3. Support
  4. Storage of food

31. Which of the following is an example of a plant that bears seeds but not fruits?

  1. Pine tree
  2. Peepal tree
  3. Cotton plant
  4. Eucalyptus tree

32. Root nodules are commonly found in

  1. Parasitic plants
  2. Epiphytic plants
  3. Leguminous plants
  4. Aquatic plants

33. The floral part that produces pollen grains is

  1. Sepal
  2. Petal
  3. Anther
  4. Ovary

34. Opium is a plant product obtained from

  1. dried leaves
  2. dried latex
  3. roots
  4. stem bark


35. The scientific method of dating based on the analysis of patterns of tree rings is known as

  1. Dendrochronology
  2. Sclerochronology
  3. Paleoecology
  4. Acanthochronology

36. Which part of the plant may be called its food factory?

  1. Fruit
  2. Leaf
  3. Stem
  4. Root

37. The tree of Azadirachta indica is commonly known as

  1. Peepal
  2. Neem
  3. Banyan
  4. Mango

38. Most cactus plants do not have –

  1. Leaves
  2. Flowers
  3. Stem
  4. Roots

39. Which plant is known as the Terror of Bengal?

  1. Water Hyacinth
  2. Lantana Camara
  3. Congress Grass
  4. Money Plant

40. Ficus Reliogosa is the scientific name of which common tree?

  1. Peepal
  2. Neem
  3. Banyan
  4. Tulasi


41. Which plant is commonly known as touch-me-not plant?

  1. Ailanthus triphysa
  2. Mimosa pudica
  3. Musa paradisicum
  4. Ananas sativus

42. The process by which plants lose water into the atmosphere is known as –

  1. Transpiration
  2. Osmosis
  3. Perspiration
  4. Photosynthesis

43. Plants adapted to grow in dry regions are known as –

  1. Halophytes
  2. Xerophytes
  3. Thallophytes
  4. Epiphytes

44. In which part of the plant are stomata found?

  1. Stem
  2. Root
  3. Flower
  4. Leaf

45. What is the pollination agent in hydrophily?

  1. Bee
  2. Water
  3. Wind
  4. Bird

46. Lycopersican esculentum is the scientific name of –

  1. Potato
  2. Cucumber
  3. Cabbage
  4. Tomato

47. From which of the following plants is bio-diesel obtained?

  1. Pine
  2. Eucalyptus
  3. Lantana
  4. Jatropha

48. Which is a macronutrient for plants?

  1. Copper
  2. Nitrogen
  3. Iron
  4. Chloride

49. Cannabis plant is the source of –

  1. Opium
  2. Cocaine
  3. Quinine
  4. Marijuana

50. Allicin is substance found in –

  1. Tomato
  2. Spinach
  3. Garlic
  4. Turmeric