Concept explainers
To explain:
Difference in the way autotrophs and heterotrophs obtain energy
Introduction: All living organisms need energy to carry out various biological functions. Almost all the energy in living organisms comes from the Sun. Energy flows from autotrophs to heterotrophs.
Answer to Problem 10A
Light energy is converted into chemical energy during the process of photosynthesis.
Explanation of Solution
All living organisms need energy to survive. Directly or indirectly all the energy comes from the Sun. some organisms make their own food while some obtain food from other organisms. Autotrophs are organisms that make their own food through the process of photosynthesis in which light energy from the Sun is converted to chemical energy for use by the cell. Autotrophs that use the solar energy along with carbon dioxide and water to form glucose and oxygen are called photoautotrophs. Some autotrophs called chemoautotrophs use inorganic substances as sources of energy.
Organisms that obtain food from other organisms are called heterotrophs. They have to ingest food to obtain energy. The energy stored in autotrophs as glucose can be transferred to other organisms like heterotrophs when they are consumed as food.
Chapter 8 Solutions
Biology Illinois Edition (Glencoe Science)
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