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Fill in the blanks. (a) The small green leaves at the base of flowers are known as ___. (b) The swollen basal part of the pistil is the which bears the . (c) Stamen has two parts called_ and . (d) The young unopened flower is termed as____.

(a) The small green leaves at the base of the flower are known as sepals. The sepals protect the flower... View Article

Which of the following terms constitute the female part of the flower? (a) Sepals, petal and stamen (b) Stigma, style and ovary (c) Ovary, stamen and stigma (d) Ovary, style and stamen

b) Stigma, style and ovary Explanation The stigma receives the pollen grain, the pollen tube passes through the style and... View Article

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. (a) (iii) and (iv) (b) (i) and (iii) (c) (ii) and (iv) (d) (i) and (iv)

Statement (i) and (iii) are correct. Explanation The leaves make food for the plant by the process of photosynthesis. In... View Article

Which of the following is not a correct match? (a) Petiole: attaches the leaf to stem (b) Lamina: green flat part of the leaf (c) Margin: gives shape to the leaf (d) Veins: transpiration

d) Veins: transpiration Explanation In transpiration the evaporation of water takes place, the process is done by stomata of the... View Article

Which of the following is not the primary function of the stem? (a) Conduction of water (b) Photosynthesis (c) Formation of branches (d) Bears flowers and fruits

b) Photosynthesis. Explanation Photosynthesis is the primary function of leaves. The important functions of a stem include: A stem carries... View Article

Which of the following is the correct match between the characteristics of the stem and the category of a plant? (a) The weak stem which cannot stand upright: Creeper (b) Green tender stem: Shrub (c) Thick, hard stem with branching near the base: Tree (d) Thick, hard stem with branches high on the plant: Herb

a) Weak stem which cannot stand upright: Creeper Explanation A plant that has thin, long and weak stem is called... View Article

Which of the following combination of features would you observe in the grass? (a) Parallel venation and fibrous root (b) Parallel venation and taproot (c) Reticulate venation and fibrous root (d) Reticulate venation and taproot

a) Parallel venation and fibrous root Explanation Parallel venation and fibrous roots are usually found in grass, maize, wheat etc.... View Article

Explain the process of rooftop rainwater harvesting with the help of a suitable diagram.

Rooftop rain water harvesting is a method where ran water that falls on the rooftop of a building or house,... View Article

Dissolve two spoons of common salt in half a cup of water. Now if you want to get the salt back, what will you do?

To get salt back from a half cup of water with two spoons of common salt already dissolved in it,... View Article

Draw a diagram to show how sea water reaches a lake or pond.

1. Evaporation The sun is the ultimate source of energy, and it powers most of the evaporation that occurs on... View Article

Most of the water that falls on the land as rain and snow, sooner or later goes back to a sea or an ocean. Explain how it happens?

Most of the water that falls on the land as rain and snow, sooner or later goes back to a... View Article

Fill in the blanks selecting words from, the following list. Snow, rain, clouds, vapour, evaporation, transpiration. Water, as ____ goes into atmosphere by the processes of _ and _ and forms , which on condensation fall in the form of and ___.

(i) vapour. (ii) evaporation. (iii) transpiration. (iv) clouds. (v) snow. (vi) rain. The water cycle has a tremendous impact on... View Article

Why is there a need for conserving water? Give two reasons.

Conservation of water mainly refers to protect, preserve, and control the usage of water and its resources. It is the... View Article

How do the areas covered with concrete affect the availability of groundwater?

The areas that are covered with concrete lower the availability of ground water because such areas reduce the seepage (entry)... View Article

Water kept in sunlight gets heat from sun and is evaporated. But how does water kept under the shade of a tree also get evaporated? Explain.

Water gets evaporated despite being under the tree during the daytime because the air surrounding the tree also gets heated... View Article

Why do wet clothes placed on a clothes line get dry after some time? Explain.

Wet clothes placed on a clothes line get dry after some time because the water gets dried up from the... View Article

Write any two activities which require less than one bucket of water.

Two activities that require less than one bucket of water are- Brushing teeth Making one page of a book Water is... View Article

Write any two activities which require more than a bucket of water.

Two activities that require more than a bucket of water are- Washing a huge number of clothes Irrigating a crop... View Article

“Catch water where it falls” is the basic idea behind (a) recycling of water (b) making dams to store water (c) rainwater harvesting (d) condensation of water vapour.

(c) rainwater harvesting Explanation Rainwater harvesting is a method used to collect rainwater. By storing the water, we can increase... View Article

Floods causes extensive damage to (a) crops (b) property and human life (c) domestic animals (d) all of the above

(d) all the above Explanation A flood is an overflow of water on land. Sometimes a river might receive extra... View Article

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