Biology - Quiz #2 Practice

All food webs and food chains begin with _________________.

• primary consumer

• producers

• secondary consumers

• tertiary consumers

In this energy pyramid, which organisms have the most energy available?

• Producers
• Carnivores
• Herbivores
• Top Predator

In an ecological pyramid, which type of organism always has the least amount of energy available?

• Producers

• Herbivores

• Carnivores

• Apex Predator

In this ecological pyramid which type of consumer gets only 10% of the energy stored in plants?

• Herbivore
• Carnivore
• Omnivore
• Secondary Consumer

What percentage of energy is passed on to each tropic level?

• 10%
• 50%
• 90%
• 100%

Energy increases as you move up the food pyramid (from bottom to top).

• True 
• False

Who does the grasshopper get energy from? 

• Grass
• Grasshopper
• Mouse
• Ow

How are primary consumers different from secondary consumers?

• Primary consumers eat only plants; secondary consumers eat other consumers.

• Primary consumers eat other consumers; secondary consumers eat only plants.

• Primary consumers eat plants and other consumers; secondary consumers eat plants and decompose matter.

• Primary consumers eat plants and decompose matter; secondary consumers eat plants and other consumers.

An ocean bay food web is pictured.

Imagine a sea otter moves to the area. The sea otter eats crabs. What would happen to the ecosystem?

• The ecosystem would stay the same

• The sea duck population will decrease (go down)

• The crab population will increase (go up)

• The sea duck population would increase (go up)

An example of competition in the picture would be...

• The clouds and rocks competing for sunlight

• The tree and grass competing for soil nutrients

• The fox and river competing for water

• The fox and grass competing for food