Biology Unit 2 Review

Which of the following is an example of hierarchical organization in multicellular organisms?

• Atoms forming molecules

• Tissues forming organs

• Communities forming ecosystems

• Elements forming compounds

Tags

NGSS.HS-LS1-2

What evidence supports the endosymbiont theory?

• Fossilized single-celled organisms

• DNA in mitochondria and chloroplasts

• The presence of organ systems in multicellular organisms

• Similarities in ecosystems over time

Which process is essential for the continuous cycling of matter and energy in ecosystems?

• Photosynthesis

• Mitosis

• Dehydration synthesis

• Endocytosis

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-5

NGSS.HS-LS1-5

The chemical property of water that allows it to stick to other substances is known as:

• Cohesion

• Adhesion

• Polarity

• Surface tension

What is the main reason Earth's early environment was conducive to the formation of life?

• Abundant oxygen

• Stable temperatures

• Presence of liquid water and organic molecules

• High levels of radiation

Which macromolecule is primarily responsible for storing genetic information?

• Lipids

• Proteins

• Nucleic acids

Enzymes are classified as which type of macromolecule?

• Lipids

• Proteins

• Carbohydrates

• Nucleic acids

What is the primary function of carbohydrates in living organisms?

• Storing genetic information

• Long-term energy storage

• Quick energy supply

• Catalyzing chemical reactions

What property of enzymes allows them to speed up chemical reactions?

• Enzymes are consumed in the reaction

• Enzymes lower the activation energy

• Enzymes increase the reaction temperature

• Enzymes change the products of the reaction

Tags

NGSS.HS-PS1-2

Which of the following describes a lipid?

• Contains fatty acids and is hydrophobic

• Made of amino acids and speeds up reactions

• Stores genetic information

• Provides structural support in plants