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Organism's Energy and Material Requirements

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Organism's Energy and Material Requirements

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Questions and Answers

What is the primary role of enzymes in heterotrophs?

To convert carbon dioxide and water into carbohydrates

To produce energy through the process of photosynthesis

To store energy in the form of starch for later use

To break down complex substances into simpler ones for use in the body (correct)

Which organisms rely directly or indirectly on autotrophs for survival?

Animals and fungi (correct)

Organisms utilizing carbohydrates for energy

Organisms producing energy through photosynthesis

Green plants and some bacteria

What is the primary function of chlorophyll in autotrophs during photosynthesis?

Converting carbon dioxide and water into carbohydrates (correct)

Storing energy in the form of starch

Converting sunlight and water into energy

Breaking down carbohydrates into simpler forms

How are the energy requirements of autotrophic organisms fulfilled?

By converting sunlight and water into stored forms of energy Signup and view all the answers

What is the purpose of storing carbohydrates in the form of starch in autotrophs?

To serve as an internal energy reserve for later use Signup and view all the answers

What is the purpose of keeping the plant in a dark room for three days before exposing it to sunlight?

To allow the plant to use up all of its starch reserves Signup and view all the answers

What is the function of the guard cells in relation to the stomatal pores?

They regulate the opening and closing of the stomatal pores based on the water content Signup and view all the answers

What can be concluded about the green dots observed in the cells of a leaf under a microscope?

They are chloroplasts containing chlorophyll, essential for photosynthesis Signup and view all the answers

What is the primary function of chlorophyll in the process of photosynthesis?

Absorption of light energy for conversion to chemical energy Signup and view all the answers

Why do plants close their stomatal pores when they do not need carbon dioxide for photosynthesis?

To prevent excessive water loss through transpiration Signup and view all the answers

What determines the form of nutrition in organisms?

The type and availability of food material Signup and view all the answers

Which organisms break down the food material outside the body and then absorb it?

Bread moulds and yeast Signup and view all the answers

What is the nutritive strategy used by leeches and ticks?

Parasitic nutritive strategy Signup and view all the answers

What determines what can be taken in and broken down by an organism?

The organism's body design and functioning Signup and view all the answers

What is the outcome of the food source being stationary or mobile for an organism?

It affects how the food is accessed and what nutritive apparatus is used Signup and view all the answers

From where do some organisms derive nutrition without killing the source?

From plants or animals without killing them Signup and view all the answers