Photosynthesis and Plant Functions

The video tutorial explains the two modes of nutrition: autotrophic and heterotrophic. It focuses on autotrophs, organisms that synthesize their own food through photosynthesis. The process involves converting carbon dioxide and water into carbohydrates using sunlight and chlorophyll. The tutorial details the role of stomata and guard cells in gas exchange, the function of chlorophyll in absorbing sunlight, and the steps of photosynthesis, including light absorption, energy conversion, and carbohydrate synthesis.

What is the primary difference between autotrophs and heterotrophs?

• Neither autotrophs nor heterotrophs make their own food.

• Autotrophs make their own food, while heterotrophs depend on others for food.

• Autotrophs depend on others for food, while heterotrophs make their own food.

• Both autotrophs and heterotrophs make their own food.

Which of the following is an example of an autotroph?

• Lion

• Mushroom

• Green plant

• Human

What are the main components required by plants to synthesize carbohydrates?

• Water and nitrogen

• Oxygen and sunlight

• Carbon dioxide and oxygen

• Carbon dioxide and water

What is the function of stomata in plants?

• To absorb sunlight

• To store water

• To exchange gases

• To transport nutrients

How do guard cells regulate the opening and closing of stomata?

• By producing chlorophyll

• By swelling and shrinking

• By absorbing sunlight

• By changing color

What role does chlorophyll play in photosynthesis?

• It releases oxygen

• It stores carbohydrates

• It absorbs sunlight

• It absorbs water

What is the main product of photosynthesis?

• Water

• Oxygen

• Carbon dioxide

• Glucose

Which process involves the conversion of light energy into chemical energy?

• Digestion

• Fermentation

• Photosynthesis

• Respiration

What happens to water molecules during photosynthesis?

• They are split into hydrogen and oxygen

• They are stored in the roots

• They are converted into carbon dioxide

• They are absorbed by chlorophyll

What is released into the atmosphere as a byproduct of photosynthesis?

• Hydrogen

• Carbon dioxide

• Nitrogen

• Oxygen