HES Midterm 2022 - 2023

What are groups of different populations living togther in the same place at the same time called?

• An organism
• A population
• A community
• A biosphere

What is it called when you have groups of different populations along with their abiotic factors?

• An organism
• A population
• A community
• An ecosystem

Which sequence shows increasing ecological levels of organization?

• organism, population, community, ecosystem

• ecosystem, population, organism, community

• community, ecosystem, population, organism

• population, organism, ecosystem, community

Which set of descriptions correctly states the difference between a population and a community?

• Population: one species in an area Community: one species worldwide

• Population: organisms in a small area Community: organisms in a large area

• Population: living parts of an area Community: living and nonliving parts of an area

• Population: one type of organism in an area Community: many types of organisms in an area

Why do higher trophic levels in most ecosystems contain fewer organisms than lower trophic levels?

• Energy available for use to the highest trophic level is small

• Energy available for use to the lowest trophic level is small.

• Energy available for use to the highest trophic level is large.

• Energy available for use to the highest and lowest trophic levels is the same.

The diagram shows a general representation of an energy pyramid for a living system.

As energy flows through the pyramid,

• 10% of available energy is passed to each increasing trophic level

• 25% of energy is gained at each increasing trophic level.

• energy remains the same at each trophic level.

• energy increases at each trophic level.

DIRECTIONS: The food chain below shows the feeding relationship between populations of grass, rabbits, and foxes. Use the food chain to answer any questions that follow.

Grass → Rabbits → Foxes

• 1%

• 10%

• 25%

• 50%

Which table shows the correct role of each organism in the food chain below?

Algae → Shrimp → Artic Cod → Ringed Seals → Polar Bears

• 
• 
• 
• 

An ocean food chain is shown in the diagram below.

Which organism represents the trophic level containing approximately 1% of the initial amount of solar energy acquired by the phytoplankton?

• Copepods

• Sand eels

• Herring

• Humans

Which cycle explains the movement of water through Earth's systems?

• phosphorus cycle

• nitrogen cycle

• hydrologic cycle

• carbon cycle