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Practice each question, then open the answer or worked solution.
Which of the following combination of features would you observe in the grass?
Ans: The correct answer is option (b) Parallel venation and fibrous root.
Grasses have parallel venation on their leaves. Fibrous roots are like thin fibres that arise in groups from the base of the stem.
Which of the following is the correct match between the characteristics of stem and the category of plant?
Ans: The correct answer is option (a) Weak stem which cannot stand upright: Creeper. A plant that has thin, long and weak stems is called a creeper. It cannot stand upright and spreads on the ground. A shrub is of medium size and has thick and hard stems. Herbs are small plants with tender and green stems. And trees are tall plants that have thick and hard stems with branches high on the plant.
Which of the following is not the primary function of the stem?
Ans: The correct answer is option (b) Photosynthesis. Photosynthesis is the primary function of leaves. The stem performs the following functions-
i. Hold the plant upright.
ii. Carrying water and minerals from roots to the leaves.
iii. It grows in the form of branches and bears flowers and fruits.
Which of the following is not a correct match?
Ans: The correct answer is option (d) Veins: Transpiration. The process of transpiration involves the evaporation of water, which is carried out by the stomata of the leaves. The veins function as small tubes that carry water into the leaf.
Read the following sentences about photosynthesis:
(i) Sunlight, carbon dioxide, chlorophyll and water are necessary.
(ii) Oxygen is absorbed.
(iii) Leaves carry out photosynthesis.
(iv) Proteins are made during photosynthesis.
Choose the correct pair of sentences that are true to photosynthesis
Ans: The correct answer is option (b) (i) and (iii). Photosynthesis is a process carried out by leaves that requires sunshine, carbon dioxide, chlorophyll, and water. Glucose is produced, and oxygen is released.
Which of the following terms constitute the female part of the flower?
Ans: The correct answer is option (b) Stigma, style, and ovary.