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Science

Transportation

In this Class 10 Science topic from the Life Processes chapter, students learn how materials move within plants and animals to support survival. The topic explains the human circulatory system, including the heart, blood, blood vessels, double circulation, and lymph, along with the transport of oxygen, nutrients, hormones, and wastes. It also covers transport in plants through xylem and phloem, and shows how transpiration helps in the movement of water and minerals from roots to leaves.

Hard · Level 1 · 1 questions

Practice questions

01Why is food transport in phloem considered energy dependent?

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Answer and explanation

Correct answer: A. Because food must be actively moved from the source to parts that need it

Phloem translocation distributes sugars such as sucrose from a source, usually a photosynthesising leaf, to sinks such as roots, fruits, seeds, or growing tissues. Loading sugars into sieve tubes and maintaining the pressure gradient require metabolic energy, especially from companion cells. Transport can occur in different directions according to demand. Therefore A is correct; the other choices wrongly describe phloem as dead tissue or a water-only pathway.

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Transportation

Practice questions

01Why is food transport in phloem considered energy dependent?फ्लोएम में भोजन का परिवहन ऊर्जा पर निर्भर क्यों माना जाता है?

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01Why is food transport in phloem considered energy dependent?