Biology S2 Exam (Study Guide) 23-24

In the energy pyramid here, how much of the energy in the producers gets passed to the herbivores?

• 10%
• 20%
• 80%
• 90%

Which experiences the least change over time?

• Pioneer Species

• Primary Succession

• Aquatic Succession

• Climax Community

Starting on bare rock, what is the usual ecological succession of organisms?

• lichens 🡪 grasses 🡪 shrubs 🡪 trees

• lichens 🡪 shrubs 🡪 grasses 🡪 trees

• grasses 🡪 shrubs 🡪 lichens 🡪 trees

• shrubs 🡪 grasses 🡪 lichens 🡪 trees

What would happen in this ecosystem if the fox went extinct? Choose 2.

• Mouse population would increase

• Grasshopper population would decrease

• Shrew populations would decrease

• No impact

Human impact on the environment is often more dramatic than the impact of most other living things because humans have a greater

• need for water

• need for food

• ability to adapt to change

• ability to alter the environment

Why do the populations of invasive species grow so quickly?

• Invasive Species are native to an area.

• Invasive species have no predators.

• Invasive species are prey to many animals.

• Invasive species keep the ecosystems in equilibrium.

What are the greatest problems facing plants, animals, and people?

• habitat destruction

• illegal hunting

• introducing new species that can cause problems

• all of the above

What cycle are fossil fuels part of ?

• carbon

• oxygen

• nitrogen

• phosphorus

Which nutrient is not cycled through the atmosphere?

• carbon
• nitrogen
• phosphorous
• water

Why do living things need nitrogen?

• To get energy

• To make amino acids

• To make proteins

• To make proteins AND amino acids