In the scenario, the forester wonders why one forest had mature hemlocks and very few young hemlocks. Which part of a scientific method does this best illustrate? 1. Setting up an experiment
2. Communicating the results of a study
3. Making an observation and asking a question
4. Forming a hypothesis

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water.b. they use chlorophyll and oxygen to make carbon dioxide and water.c. they use sunlight, water, and carbon dioxide to make sugars.d. they use sunlight, water, and oxygen to make chlorophyll.