Question

1. which of the following is an example of a stimulus? a) growing larger b) hearing a loud sound c) breathing oxygen d) digesting food 6. what is the main difference between autotrophs and heterotrophs? a) autotrophs move while heterotrophs do not b) autotrophs make their own food; heterotrophs consume others c) heterotrophs live underwater; autotrophs live on land d) autotrophs use oxygen while heterotrophs do not 7. the ability to break down materials for energy is called: a) photosynthesis b) metabolism c) excretion d) respiration

Explanation:

• Question 10: A stimulus is something that causes a response. Hearing a loud sound (B) is a stimulus as it can cause a reaction like jumping or covering ears. Growing larger (A) is a developmental process, breathing oxygen (C) and digesting food (D) are metabolic processes.
• Question 6: Autotrophs (like plants) make their own food via photosynthesis. Heterotrophs (like animals) consume other organisms for food. Movement (A), habitat (C), and oxygen use (D) are not the main differences.
• Question 7: Metabolism (B) is the set of chemical reactions that break down materials for energy. Photosynthesis (A) is making food from light, excretion (C) is removing waste, and respiration (D) is a part of metabolism but specifically about gas exchange and energy release from glucose in a more narrow sense compared to the overall breakdown for energy (metabolism).

Answer:

1. B. Hearing a loud sound
2. B. Autotrophs make their own food; heterotrophs consume others
3. B. Metabolism