Essential Biological Processes and Concepts

What is the biosphere?

• A part of Earth where life exists

• A type of ecosystem found in oceans

• A layer of the atmosphere

• A type of plant species

What process do producers use to transform carbon dioxide and water into sugars?

• Cellular respiration

• Photosynthesis

• Decomposition

• Fermentation

What is released into the environment during photosynthesis?

• Nitrogen

• Oxygen

• Methane

• Hydrogen

What is the primary source of energy for most ecosystems on Earth?

• The moon

• The sun

• The ocean

• The wind

What process do plant and animal cells use to release energy from sugars?

• Photosynthesis

• Cellular respiration

• Fermentation

• Evaporation

What is a nutrient?

• A type of plant

• A substance in food that provides energy or helps form body tissues

• A kind of animal

• A form of water

What process do cells use to release energy stored in sugars?

• Photosynthesis

• Decomposition

• Cellular respiration

• Evaporation

Which element is essential to life because cells are made of its compounds?

• Oxygen

• Hydrogen

• Carbon

• Nitrogen

What role do decomposers play in an ecosystem?

• They produce oxygen

• They recycle nutrients back to the nonliving environment

• They create energy from sunlight

• They store water in the soil