Class 7-Science :Quiz-4

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Chapter 1 - Nutrition in Plants

What role does the insect play in the insectivorous plant?

5 points

Fertilization process.

Provides nutrients to the plant.

Dispersal of seeds.

Provides carbon dioxide to the plant.

Clear selection

Which part of the leaf controls the rate of loss of water to the air?

5 points

Midrib

Stomata

Vascular bundles

Veins

Clear selection

Which of the following is insectivorous?

5 points

Mushroom

Cuscuta

Mucor

Nepenthes

Clear selection

Which of the following statements is true about croton plants?

5 points

Croton plants do not contain chlorophyll.

Croton plants are dark red in colour. Hence they depend on other plants for food.

Croton plants have chlorophyll but it is hidden by dark red colour pigments.

Croton plants are parasites

Clear selection

What is the role of the bacteria in leguminous plants?

5 points

Convert oxides of nitrogen into soil nitrates.

Convert atmospheric nitrogen gas into soil nitrates.

Convert soil nitrates into gaseous nitrogen.

Convert plant proteins into ammonia.

Clear selection

What is the principal source of energy input to biological systems?

5 points

Carbohydrates from plants

Light from the sun

Nutrients from the soil

Oxygen from the air

Clear selection

Which of the following statement is/are true about photosynthesis?

5 points

P and S only

Q, R and S only

P, Q, R and S

P, Q, and R

Clear selection

How does most carbon dioxide reach into the photosynthesizing cells of a green leaf?

5 points

Through the hypodermis of the leaf.

Diffusion through the stomata of the leaf.

Movement through the phloem.

Movement through the xylem.

Clear selection

Which of the following organisms are found as slimy, green patches on ponds or on stagnant water?

5 points

Fungi

Bryophytes

Bacteria

Algae

Clear selection

How does photosynthesis help to maintain the percentage of oxygen and carbon dioxide in the atmosphere?

5 points

By giving off carbon dioxide and absorbing oxygen.

By giving off oxygen and absorbing carbon dioxide.

By releasing oxygen and carbon dioxide.

By absorbing oxygen and carbon dioxide.

Clear selection

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