I. Tick the correct option to complete each sentence.

    1. Carrot plants have...

        prop roots            fibrous roots        taproots        stilt roots

ans:    taproots

    2. Food conducting tubes are called...

        stigma         stomata        xylem        phloem

ans:    phloem

    3. Plants make their food with the help of ...

        sunlight, water and oxygen

        sunlight, water, carbon dioxide and chlorophyll

        chlorophyll and oxygen

        chlorophyll only

ans:    sunlight, water, carbon dioxide and chlorophyll

    4. A typical or complete flower has ...

        sepals and petals

        sepals, petals, stamens and carpel

        sepals, petals and stamens

        stamens and carpels

ans:     sepals, petals, stamens and carpel

    5. The carpel is made up of...

        stigma, style and ovary        anthers and pollen grains

        petals, sepals and stamens    only stamens

ans: stigma, style and ovary

    6. The leaves of cacti are modified into spines to...

    conserve water        store food        trap insects        provide support

ans:    conserve water

II. Fill in the blanks.

    1. The xylem  tubes transport water in the plant.

    2. The flower bud is protected by sepals.

    3. Pollen grains are formed in the pollen sacs.

    4. Food prepared by the leaves is int he form of sugar.

    5. Excess food is stored in the plants in the form of starch.

    6. The process by which a plant loses water is called transpiration.

    7. All monocot plants have fibrous roots while dicot plants have tap roots.

III. Identify the part of the plant.

    1. Stomata

    2. roots

    3. anther.

    4. sepals

    5. root hairs

    6. ovary

IV. Answer in the following in one sentence.

    1. What are the end products of photosynthesis?

Ans: The end products of photosynthesis are sugar and oxygen`

    2. What is the function of root hairs?

Ans: Root hairs help the plants to absorb water dissolved minerals from the soil.

    3.    Why is chlorophyll essential for the process of photosynthesis?

Ans: Chlorophyll is essential for the process of photosynthesis because it traps the energy of sunlight.

    4. How many types of venation do plants have?

Ans: Plants have two types of venation.

    5. How is xylem different from phloem?

Ans: Xylem transports water in a plant while phloem transports food in a plant.

    6. In which part of a flower, is the pollen likely to be found?

Ans: Pollen is found in the anther.

V. Answer the following questions in two sentences.

    1. Why do trees have bark?

Ans: The trees have bark to protect the inner part of the tree, it prevents water loss and it protects the tree from harmful insects as well as harsh weather.

    2. What are the modification of roots? Give examples.

Ans: Modification of roots:

            a. Roots modified to store food. Example : carrot, beetroot.

            b. Roots modified to provide extra support. Example: Banyan tree.

     3. What are the functions of shoot system?

Ans: The functions of shoot system:

            a. It bears branches, leaves, flowers and fruits.

            b. It carries water absorbed by the roots to the rest of the plant.

            c. It carries food made by the leaves to all the other parts.

    4. Why do cactus plants have spine like leaves?

Ans: The leaves of Cacti are modified into spine to conserve water by preventing loss of water.

    5. Why do plants wilt when they do not get a regular supply of water?

Ans: Plants constantly lose water through transpiration, So plants wilt when they do not get a regular supply of water.

    6. What is the difference between a flowering and a non-flowering plant?

Ans: Flowering plants have flowers, while non-flowering plants do not have flowers.

VI. Answer in about four to five sentences.

    1. How do plants prepare food?

Ans: Plants prepare food by the process of photosynthesis. In this process, the leaves play the important role. The chlorophyll presents on the leaves traps the energy of sunlight. The leaf absorbs carbon dioxide. the roots absorb water and minerals from the soil. The leaf uses the sunlight, water and carbon dioxide to produce food in the form of sugar. 

    2. Explain transpiration in plants with an experiment.

Ans: Plants lose water through stomata. This process is called transpiration. It can be seen by an experiment discussed below.

    The leaves of a twig is tied by a polythene bag. After a day if we observe the bag it will be noticed that droplets of water present inside the bag. It proves that leaves lose water.

    3. Describe an insectivorous plant with an example.

Ans: Some plants that grow in mineral deficient soil feed on insects. Such plants are called insectivorous plants.

        Pitcher plant is an example of insectivorous plants. The leaf of a pitcher plant are of a pitcher shaped. When an insect enter the pitcher to suck nectar, immediately the flap lowers like the lid of container to trap the insect inside. The insect will be digested and the plants will get the essential nutrients. 

    4. Draw a well labelled diagram of the structure of a leaf.

Ans: Do it yourself.

    5. Draw a diagram of a complete flower and label and its parts.

Ans: Do it yourself.