Homework Practice

Printable assignment

Final Assessment: Nutrition in Plants

Section A: Core Ideas

Question 1mcq

Which organism is most likely to show autotrophic nutrition?

A.A green spinach plant

B.A cow

C.A mushroom

D.A human being

Question 2mcq

A mushroom grows on a rotting log. Why is it not called autotrophic?

A.It is small in size.

B.It gets ready-made food from dead organic matter.

C.It grows near plants.

D.It contains too much chlorophyll.

Question 3mcq

A plant is watered well but kept in a closed box with no light. Which process is most directly affected?

A.Absorption of water by roots

B.Transport through stem

C.Photosynthesis

D.Opening of seed coat only

Question 4mcq

In a destarched plant experiment, why is the plant first kept in darkness before testing photosynthesis?

A.To add iodine to the leaves naturally.

B.To make the roots stop absorbing water.

C.To remove carbon dioxide from the air permanently.

D.To use up stored starch so new starch formation can be tested fairly.

Question 5mcq

In photosynthesis, which product is released into the air?

A.Oxygen

B.Nitrogen

C.Iodine

D.Salt

Question 6mcq

A student writes: carbon dioxide + oxygen

\rightarrow

glucose + water. Which correction is needed?

A.Carbon dioxide should be removed from photosynthesis.

B.Water should be a reactant and oxygen should be a product.

C.Glucose should be a reactant only.

D.Sunlight should be the only product.

Section B: Evidence and Experiments

Question 7mcq

Which leaf feature helps plants take in carbon dioxide?

A.Root hairs

B.Flower petals

C.Stomata

D.Seed coat

Question 8mcq

Why might broad, flat leaves help photosynthesis?

A.They stop all gas exchange.

B.They prevent chlorophyll from working.

C.They make roots unnecessary.

D.They provide a larger surface to capture light.

Question 9mcq

Which statement about plant minerals is correct?

A.Minerals are needed in small amounts but are important for healthy growth.

B.Minerals are the same as sunlight.

C.Plants need only minerals and no water.

D.Minerals are produced only by flowers.

Question 10mcq

Two identical plants get equal light and water. Plant A grows in fresh garden soil; Plant B grows in exhausted soil. Plant B grows poorly. What is the best reason?

A.Plant B received too much photosynthesis.

B.The exhausted soil may lack mineral nutrients.

C.Garden soil blocks all sunlight.

D.Water cannot enter any roots in soil.

Question 11mcq

Which example shows symbiosis?

A.Cuscuta taking food from a host plant

B.A tiger eating a deer

C.Rhizobium living in legume root nodules

D.A leaf losing water by evaporation

Question 12mcq

How does the Rhizobium-legume relationship help farmers?

A.It makes crops grow without sunlight.

B.It prevents all insects from entering fields.

C.It changes all crops into fungi.

D.It can improve soil nitrogen and reduce dependence on added nitrogen fertilizers.

Section C: Special Cases

Question 13mcq

Which feature best identifies a parasitic plant?

A.It obtains food from a living host and may harm it.

B.It always traps insects in a pitcher.

C.It always grows only in water.

D.It produces oxygen at night only.

Question 14mcq

A green insectivorous plant is grown in soil rich in nitrogen. What is most reasonable?

A.It must stop making food because nitrogen is present.

B.It can still photosynthesize; insect trapping mainly supplements nutrients.

C.It becomes a parasite immediately.

D.It no longer needs water or carbon dioxide.

Question 15mcq

A plant has enough water and minerals but is kept in very dim light. What outcome is most likely over time?

A.Photosynthesis will become faster than in sunlight.

B.The plant will make food from minerals only.

C.Food production will be low, so growth may become weak.

D.The leaves will not need chlorophyll.

Question 16mcq

A student says, 'Fertilizer is plant food.' What is the best correction?

A.Fertilizer is sunlight in solid form.

B.Fertilizer replaces carbon dioxide completely.

C.Fertilizer is the oxygen released by leaves.

D.Fertilizer provides minerals; the plant makes food by photosynthesis.

Question 17mcq

Which condition is necessary for photosynthesis?

A.Sunlight

B.Sound

C.Plastic covering on soil

D.Cooked rice

Question 18mcq

What is the role of chlorophyll in photosynthesis?

A.It digests insects in every leaf.

B.It traps light energy needed for making food.

C.It carries food through the food pipe.

D.It turns oxygen into nitrogen.

Section D: Mixed Reasoning

Question 19mcq

If oil is spread on both surfaces of a leaf, photosynthesis may decrease. Which reason is most likely?

A.Oil adds extra carbon dioxide to the leaf.

B.Oil turns the leaf into a root.

C.Stomata may get blocked, reducing gas exchange.

D.Oil produces glucose directly.

Question 20mcq

Which practice best supports long-term soil fertility?

A.Removing all dead leaves from soil forever

B.Using only sand with no nutrients

C.Keeping every plant away from sunlight

D.Adding manure or compost and rotating crops with legumes

Question 21mcq

Assertion: Lichens are examples of symbiosis. Reason: In lichens, the alga and fungus live together with mutual benefit. Choose the correct option.

A.Both assertion and reason are true, and the reason explains the assertion.

B.Both assertion and reason are true, but the reason does not explain the assertion.

C.The assertion is false but the reason is true.

D.Both assertion and reason are false.

Question 22mcq

Which observation would best support that a plant is insectivorous?

A.It grows green leaves in sunlight.

B.It has modified leaves that trap insects and digestive fluid inside.

C.It has roots in soil.

D.It loses old leaves in winter.

Question 23mcq

A rooftop plant receives bright light but is not watered for many days. Which statement best predicts its food-making?

A.Photosynthesis will increase because dry soil has more sunlight.

B.The plant will use oxygen instead of water to make glucose.

C.Photosynthesis will be affected because water is a raw material.

D.The plant will photosynthesize only in roots.

Question 24mcq

Which pair is correctly matched?

A.Green plant—parasitic; Cuscuta—autotrophic

B.Mushroom—autotrophic; spinach—heterotrophic

C.Pitcher plant—no photosynthesis; algae—animal nutrition

D.Green plant—autotrophic; Cuscuta—heterotrophic/parasitic