Ecosystems Review

In a forest ecosystem, which has the most direct access to the main energy source?

• producer
• consumer
• decomposer
• scavenger

An energy pyramid shows that less food and energy is available moving from the bottom to the top.  Based on this model, where would producers be located on the energy pyramid?

• level 1
• level 2
• level 3
• level 4

How is a deer in a forest ecosystem most similar to a rabbit in the same ecosystem?

• both are decomposers
• both are consumers
• both are carnivores
• both are producers

Which best explain the function of producers in a forest ecosystem?

• Producers provide energy for consumers in the ecosystem
• Producers provide energy for decomposers in the ecosystem
• Producers provide energy for other producers in the ecosystem
• Producers provide energy for consumers and other producers in the ecosystem

Which best describes grasses, shrubs, and trees?

• consumers
• decomposers
• omnivores
• producers

Which group includes only decomposers?

• spider, fungi, and grass
• ladybug, spider, and deer
• sunflower, tree, and grass
• fungi, bacteria, and worms

The main function of a producer in an ecosystem is to

• absorb minerals from the soil.

• change water vapor into a liquid.

• make sugar through photosynthesis.

• break down dead plant and animal matter.

Which best explains why producers are at the beginning of all food

chains?

• They turn dead animals into nutrients.

• They provide shelter for smaller animals.

• They transfer energy from the sun into food.

When an animal dies in an ecosystem a mushroom will sometimes grow

on the remains of the animal. Which best describes the role of the

mushroom in the ecosystem?

• producer

• consumer

• decomposer

The number of fish in a lake suddenly increases. How will the increase most likely affect the lake?

• There will be less water in the lake.

• There will be fewer insects in the lake.

• More plants will grow in the lake.

• More frogs will live in the lake.