Penn Foster - Biology Lesson 1, The Nature of Science, the Chemistry of Life, and Ecology, Exercise Answer Key 100%Pass
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Penn Foster - Biology Lesson 1,
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Penn Foster - Biology Lesson 1,
Penn Foster - Biology Lesson 1, The
Nature of Science, the Chemistry of Life,
and Ecology, Exercise Answer Key
100%Pass
What is the scientific method?
A systematic approach to investigating natural phenomena through observation, hypothesis
formation, experimentation, and analysis.
W...
Penn Foster - Biology Lesson 1, The
Nature of Science, the Chemistry of Life,
and Ecology, Exercise Answer Key
100%Pass
What is the scientific method?
✔✔ A systematic approach to investigating natural phenomena through observation, hypothesis
formation, experimentation, and analysis.
What are the four major elements that make up most of the human body?
✔✔ Carbon, hydrogen, oxygen, and nitrogen.
What is the role of enzymes in biochemical reactions?
✔✔ Enzymes act as catalysts to speed up chemical reactions without being consumed in the
process.
What is a hypothesis?
✔✔ An educated guess or proposed explanation that can be tested through experimentation and
observation.
1
,What are the basic building blocks of proteins?
✔✔ Amino acids.
How do ionic bonds differ from covalent bonds?
✔✔ Ionic bonds involve the transfer of electrons between atoms, while covalent bonds involve
the sharing of electrons.
What is the primary function of carbohydrates in living organisms?
✔✔ To provide a primary source of energy and serve as structural components.
What is an ecosystem?
✔✔ A biological community of interacting organisms and their physical environment.
What are producers in an ecosystem?
✔✔ Organisms that produce their own food through photosynthesis or chemosynthesis, typically
plants and algae.
What is the role of decomposers in an ecosystem?
2
, ✔✔ To break down dead organisms and waste products, recycling nutrients back into the
environment.
What is a biome?
✔✔ A large geographic biotic unit characterized by its climate, soil, and the plant and animal life
it supports.
What are the three main types of ecological pyramids?
✔✔ Pyramids of numbers, biomass, and energy.
What is the significance of the water cycle in ecology?
✔✔ The water cycle redistributes water through the environment, supporting all forms of life
and regulating climate.
What is a buffer in the context of chemistry?
✔✔ A substance that helps maintain a stable pH by neutralizing excess acids or bases.
What is a controlled experiment?
3
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