Unit 1 Quick Check

Which biome has warm temperatures year-round and the highest biodiversity?

• Temperate grassland

• Tropical rainforest

• Boreal forest (taiga)

• Tundra

The primary source of energy for nearly all ecosystems is:

• Heat from Earth’s core

• The Moon’s gravitational pull

• The Sun

• Wind energy

What is the role of producers in an ecosystem?

• Break down dead matter

• Capture solar energy and convert it to chemical energy

• Consume herbivores

• Store nutrients in soil

Which organisms are responsible for nitrogen fixation?

• Decomposers

• bacteria

• Primary consumers

• Fungi

Which of the following is an example of a mutualistic relationship?

• Ticks feeding on deer

• Bees pollinating flowers

• Lions hunting zebras

• Barnacles on whales

Which biome has permafrost, low precipitation, and short growing seasons?

• Temperate deciduous forest

• Desert

• Tundra

• Savanna

What percent of energy typically transfers from one trophic level to the next?

• 90%

• 50%

• 25%

• 10%

Which part of the hydrologic cycle moves water from plants to the atmosphere?

• Precipitation

• Condensation

• Transpiration

• Infiltration

The phosphorus cycle differs from other nutrient cycles because it:

• Lacks an atmospheric component

• Requires sunlight

• Only occurs in aquatic systems

• Is not essential for living organisms

Which level of the food chain typically has the least biomass?

• Producers

• Primary consumers

• Secondary consumers

• Tertiary consumers