16 Questions
What is the primary role of enzymes in heterotrophs?
To break down complex substances into simpler ones for use in the body
Which organisms rely directly or indirectly on autotrophs for survival?
Animals and fungi
What is the primary function of chlorophyll in autotrophs during photosynthesis?
Converting carbon dioxide and water into carbohydrates
How are the energy requirements of autotrophic organisms fulfilled?
By converting sunlight and water into stored forms of energy
What is the purpose of storing carbohydrates in the form of starch in autotrophs?
To serve as an internal energy reserve for later use
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
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
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
What is the primary function of chlorophyll in the process of photosynthesis?
Absorption of light energy for conversion to chemical energy
Why do plants close their stomatal pores when they do not need carbon dioxide for photosynthesis?
To prevent excessive water loss through transpiration
What determines the form of nutrition in organisms?
The type and availability of food material
Which organisms break down the food material outside the body and then absorb it?
Bread moulds and yeast
What is the nutritive strategy used by leeches and ticks?
Parasitic nutritive strategy
What determines what can be taken in and broken down by an organism?
The organism's body design and functioning
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
From where do some organisms derive nutrition without killing the source?
From plants or animals without killing them
Explore how organisms fulfill the common requirements for energy and materials in different ways, including through the use of simple food material from inorganic sources and the breakdown of complex substances for growth and upkeep.
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