In the process of photosynthesis, which of the following energy conversions occur?

1

(a)

Solar energy is changed into chemical energy

(b)

Solar energy is changed into mechanical energy.

(c)

Bioenergy is converted into chemical energy

(d)

Chemical energy is changed into light energy.

The raw material used by plants during photosynthesis

1

(a)

N₂ and O₂

(b)

O₂, H₂, CO₂

(c)

CO₂ and water

(d)

water and minerals

In the plant of cactus leaves are modified into

1

(a)

branches

(b)

spines

(c)

leaf vein

(d)

pitcher

If iodine is dropped on the boiled leaf it gives blue-black colour due to the presence of

1

(a)

starch

(b)

protein

(c)

fat

(d)

vitamin

Algae is:

1

(a)

Parasite

(b)

Saprotroph

(c)

Autotroph

(d)

None of these

The food synthesised by the plants is stored as ________________

1

(a)

starch

__________________ plants derive their nutrient from dead and decaying animals or plants.

1

(a)

Saprophytic

The openings present on the surface of leaves are protected by cells called _____________

1

(a)

guard cells

This energy is used in process of .............

1

(a)

photosynthesis

Photosynthesis along with other raw materials like ................

1

(a)

Carbon dioxide

Name the following a parasitic plant with yellow, slender and tubular stem.

1

(a)

Cuscuta (amarbel)

Name the following a plant that has both autotrophic and heterotrophic mode of nutrition.

1

(a)

Pitcher plant (insectivorous plant)

Name the following the pores through which leaves exchange gases.

1

(a)

Stomata

............ is produced and ..............is utilised during photosynthesis.

1

(a)

Oxygen, carbon dioxide

Tiny pores present on the surface of the leaves are called ..................

1

(a)

Stomata

Which parts of the plant are called food factories of the plant?

2

(a)

A carbohydrate is produced by plants as food source. It is constituted from which molecules?

2

(a)

A goat eats away all the leaves of a small plant (balsam). However, in a few days, new leaves could be seen sprouting in the plant again. How did the plant survive without leaves?

2

(a)

How to Rhizobium bacteria take nitrogen from atmosphere?

2

(a)

Why is it true to say that insectivorous plants are partial heterotrophs? Explain

2

(a)

Show with the help of a sketch that the plants are the ultimate source of food.

3

(a)

Wheat dough if left in the open, after a few days, starts to emit a foul smell and becomes unfit for use. Give reason.

3

(a)

In what unique manner does a pitcher plant derive its nutrition?

3

(a)

If plant has a requirement for nitrogen, then from where will they obtain it?

3

(a)

2. (a) Draw a diagram of a pitcher plant to show the following parts:
(i) Pitcher
(ii) Lid
(b) What is the mode of nutrition of this plant?
(c) Is it an autotroph or partial heterotroph?

3

(a)

Wild animals like tiger, wolf, lion and leopard do not eat plants. Does this mean that they can survive without plants? Can you provide a suitable explanation?

5

(a)

(a) Draw a schematic diagram showing photosynthesis.
(b) What are the products of photosynthesis?
(c) Name the gases utilized and liberated in photosynthesis.
(d) Can all plants do photosynthesis?

5

(a)