Questions and Answers
What is the difference between autotrophs and a heterotroph? Give an example of each type of organism.
Autotrophs get their energy from the sun, while heterotrophs get their energy from eating other organisms. An example of an autotroph is a daisy, and an example of a heterotroph is a dog.
Explain how the ultimate source of energy for heterotrophs is the sun even though they cannot make their own food.
Heterotrophs either eat autotrophs or they eat other heterotrophs that ate autotrophs. These autotrophs got their energy from the sun.
A student exposed 2 plants to only red light and 2 plants to only green light. Which plant should grow better? Why?
Plants exposed to red light will grow better because plants absorb red light, but reflect away green light.
Explain why leaves change color in fall.
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People who suffer from a heart attack often have increased levels of lactic acid in their hearts. Explain what is happening to their heart muscle cells and why a heart attack can lead to death.
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Study Notes
Autotrophs vs. Heterotrophs
- Autotrophs are organisms that produce their own energy using sunlight, such as daisies.
- Heterotrophs obtain energy by consuming other organisms, for example, dogs.
Energy Source for Heterotrophs
- The sun is the ultimate energy source for heterotrophs, as they rely on autotrophs for food.
- Heterotrophs may consume autotrophs directly or eat other heterotrophs that have eaten autotrophs.
Plant Growth Under Different Lights
- Plants exposed to red light will exhibit better growth than those under green light.
- This occurs because plants absorb red light efficiently, while they reflect green light.
Leaf Color Change in Fall
- The breakdown of chlorophyll in leaves during autumn reveals the red and orange pigments.
- Chlorophyll degradation allows these accessory pigments to become more visible as temperatures drop.
Heart Attack and Lactic Acid
- During a heart attack, heart muscle cells experience oxygen deprivation and initiate lactic acid fermentation.
- Accumulation of lactic acid occurs, leading to insufficient ATP production, which may result in cardiac failure and death.
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Description
Test your knowledge on the differences between autotrophs and heterotrophs. This quiz covers energy sources, plant growth under various light conditions, and the physiological changes in plants during autumn. Additionally, it touches on the effects of lactic acid during a heart attack.
