3rd Grade ICSE

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Prepared by: learnloophq@gmail.com

Last edited 37 days ago by Learn LoopHQ.

Chapter: 05. Plants In The Surroundings

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Question 1

The tiny pores shown on the underside of the leaf are called stomata. Their function is to help the plant breathe by allowing the exchange of gases like carbon dioxide and oxygen.

The process that takes place in the leaf is photosynthesis. For this process, the leaf uses sunlight, carbon dioxide from the air, and water absorbed from the soil.

The green-coloured pigment in leaves is called chlorophyll. Its role is to trap sunlight, which provides the energy needed for photosynthesis.

Question 2

The two main systems of the plant shown are the Root System and the Shoot System.

Three parts that belong to the shoot system are the Flower, Leaf, Stem, and Fruit (any three).

The primary function of the root system is to firmly attach the plant to the soil, absorb water and minerals from the soil, and prevent soil erosion.

Question 3

The type of root system shown on the left is a Taproot, and the type on the right is a Fibrous root.

Taproots have one main, thick root that grows deep into the soil with smaller roots branching off, whereas fibrous roots consist of many fine, branching roots that arise from a single point at the stem’s base and spread widely but more shallowly.

One example of a plant that has the taproot type shown on the left is a carrot or a turnip.

Question 4

The name of the process illustrated in this diagram is germination.

The two parts that emerge from the seed are the radicle and the plumule. The radicle grows downwards and develops into the root system, while the plumule grows upwards and develops into the shoot system (stem and leaves).

Besides water, the two other essential environmental conditions required for germination to occur are the right amount of warmth (temperature) and air (oxygen).

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