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Definition: 1 Mark
Examples: 1 Mark
The mode of nutrition in which organisms take in food and digest it inside the body is called holozoic nutrition.
Examples: Humans, Amoeba, etc.

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Requirements: 1 Mark
Uses in photosynthesis: 2 Marks
For performing photosynthesis, plants require the following basic components:
1. Carbon dioxide and water
2. Chlorophyll
3. Sunlight
Carbon dioxide acts as the carbon source for sugar formation.
Water provides electrons and hydrogen.
Chlorophyll is the green pigment which helps the plant to harness light energy.
Sunlight is very important as it provides the high energy required to break the hydrogen and oxygen bonds in water.

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Statement: 1 Mark
Types of heterotrophs: 1 Mark each
Green plants can sometimes be heterotrophic.
The different types of heterotrophs are parasites, symbionts, saprophytes, and insectivores.
Any two:
1. Parasitic plants obtain their nourishment from other living organisms. Example: mistletoe.
2. Symbiotic plants develop a special relationship with certain other organisms to obtain nourishment. This type of arrangement is beneficialto both the organisms involved. Example: lichens.
3. Saprophytic plants which feed on dead or decaying organic matter. Theysecrete digestive juices onto dead and decaying matter to break it and then absorb nutrients from it. Example: coral roots.
4.Insectivorous plants have leaves that are modified into special structures which have the ability to trap small organisms like insects. The plant then derives the nutrition from the insect by slowly digesting it. Example: Venus flytrap.

Answer: Option A. -> True
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A
Desert plants have different kinds of adaptations to cope up with extreme conditions like high temperature, water scarcity, etc. The cactus leaves are modified into sharp needle-like structures to minimize the loss of water due to evaporation.

Answer: Option B. -> heterotrophs
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B
Animals and most of other organisms cannot prepare their own food. They consume food prepared by the plants. So, they are called heterotrophs (heteros = other, trophism = nutrition).

Answer: Option B. -> False
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B
In a cell, the nucleus is surrounded by a jelly- like substance called cytoplasm. It is mainly composed of water, salts and proteins. Cell membrane is the outer boundary which encloses the cell.Hence, this statement is false.

Answer: Option A. -> nitrogen
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A
Pitcher plants usually grow in areas deficient in nitrogen. Nitrogen is an important component required by plants. These plants are green and make their food by photosynthesis but to meet their nitrogen needs, they feed on insects.

Answer: Option C. -> transpiration
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C
Transpiration is the process through which plants lose water through stomata. Stomata are usually present on the underside ofthe leaves. It is essentially evaporation of water from the leaves of the plants.

Answer: Option B. -> guard cells
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B
Carbon dioxide from air is taken in through tiny pores called stomata present on the surface of the leaves. These pores are surrounded by guard cells. Guard cells regulate the opening and closing of the stomata.

Answer: Option C. -> chlorophyll
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C
Green leaves have a pigment called chlorophyll. Chlorophyll absorbs light energy which is used for photosynthesis. Chorlophyll is the pigment that imparts green color to the plants.