Biology Chapter 4 EOC Ecosystems

Year after year, Xavier raises a vegetable garden in the same plot of soil. He observes that the plants grow less abundantly from one year to the next, and they produce fewer vegetables. Which of these measurements could help explain Xavier's observations?

• The rate at which soil bacteria perform photosynthesis.

• The rate at which soil bacteria perform denitrification.

• The rate at which soil bacteria perform nitrogen fixation.

• The rate at which soil bacteria perform chemosynthesis.

Autotrophs can be classified into two groups according to which of these properties?

• energy source, either sunlight or chemicals

• food type, either plant matter or animal matter

• food quality, either living matter or dead matter

• water quality, either fresh water or salt water.

Rabbits are members of a community in a meadow. The rabbits eat grasses, clover, as well as roots, seeds, and tree bark. What describes the organisms that share the same trophic level as the rabbits?

• Snakes, hawks, and other animals that eat rabbits.

• Community members that interact with rabbits.

• Meadow animals that are about the same size as a rabbit.

• Meadow animals that eat plants and plant products.

Juanita is studying the food web of the open ocean. Which step would be most useful for her to follow to identify the primary producers of the food web?

• Look for floating plants, such as water lilies.

• Look for tiny phytoplankton that float on the ocean surface.

• Look for small animal plankton near the ocean surface.

• Look for plants or animals that live along the ocean floor.

Mark all the organisms that are considered producers

• 
• 
• 
• 
• 

The rabbit in this food web would be considered a:

• Decomposer
• Producer
• Secondary Consumer
• Primary Consumer

Put this food chain in the correct order

• Grass

• Mountain Lion

• Snake

• Grasshopper

• Shrew

Match each organism with the correct trophic level

• Mountain Lion

• Primary Consumer

• Bacteria

• Secondary Consumer

• Squirrel

• Producer

• Insect Eating Bird

• Decomposer

• Grass

• Apex Predator

Use the diagram answer the question.
What is a fitting description for this diagram?

• A Food Chain
• An Ecosystem
• A Food Web
• Biotic and Abiotic Factors

Use the diagram to answer the question.
The Mayfly is a food source for which 3 organisms?

• Frog, Dragon Fly and snake
• Frog, trout and dragon fly
• Frog, salamander and trout
• Frog and phytoplankton