PLTW PBS Unit

What is the primary function of the circulatory system in the human body?

• Transporting nutrients and oxygen to cells

• Digesting food and absorbing nutrients

• Producing hormones

• Filtering waste from the blood

Which of the following is a characteristic of a prokaryotic cell?

• Presence of a nucleus

• Lack of membrane-bound organelles

• Multicellular structure

• Large size compared to eukaryotic cells

In a DNA molecule, which base pairs with adenine?

• Thymine

• Cytosine

• Guanine

• Uracil

What is the chemical formula for glucose?

Tags

NGSS.MS-PS1-1

Which organelle is responsible for energy production in cells?

• Mitochondria

• Ribosome

• Nucleus

• Golgi apparatus

What is the process by which plants convert sunlight into chemical energy?

• Photosynthesis

• Respiration

• Transpiration

• Fermentation

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following is an example of a chemical change?

• Melting ice

• Boiling water

• Burning wood

• Breaking glass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the main component of the Earth's atmosphere?

• Oxygen

• Nitrogen

• Carbon dioxide

• Argon

Which of the following best describes an ecosystem?

• A community of organisms interacting with their environment

• A single species living in a habitat

• A group of similar organisms

• A physical environment without living organisms

What is the role of enzymes in biological reactions?

• Speed up reactions by lowering activation energy

• Provide energy for reactions

• Act as reactants in chemical reactions

• Inhibit reactions by increasing activation energy

Tags

NGSS.MS-LS1-7