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Observe the following diagram… (Class 10 Science 2023, Q8)

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ScienceCBSE Class 10 · Board exam 2023, set 31/4/1 · 1 mark · MCQ

CBSE Class 10 Science 2023: question 8

Set in the CBSE Class 10 board exam of 2023, paper 31/4/1, section A, question 8, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q8 · 1 mark · MCQLife Processes

Observe the following diagram and identify the process and its significance from the following options :

  1. (A)Evaporation : maintains water contents in leaf cells.
  2. (B)Transpiration : creates a suction force which pulls water inside the plant.
  3. (C)Excretion : helps in excreting out waste water from the plant.
  4. (D)Translocation : helps in transporting materials from one cell to another.

Figure in the paper: Plant with roots in soil labelled Water, a stem/trunk with upward arrows showing water moving up, and a leaf at the top with an arrow labelled Water vapour leaving the leaf. See it in the official paper.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2023 board paper, set 31/4/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

What is the name for the loss of water vapour from the aerial parts of a plant?

Hint 2

How does this help water move upward in the plant?

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. The figure shows water vapour leaving the leaves, which is transpiration.

  2. Transpiration creates a suction pull that draws water up from the roots through the xylem. Option (B) is correct.

    1 mark

Answer: Transpiration, option (B)

Where the marks are

  • Transpiration with its suction pull (1 mark)

Revise the chapter

  • Chapter: Life Processes (notes, formulas, where marks are lost and every past question)
Practise this chapterBoard-style questions from Life Processes, one at a time, marked against the answer key and marking points.Back to the full paper2023 board paper, set 31/4/1: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.