Ecology Review- for Bio.

The trophic pyramid is a triangular shape because

• 90% of energy is lost to heat, movement, and survival, and only 10% of energy goes to the next level

• People see the top of the pyramid so it is important to know the keystone species.

• 10% of energy is lost to heat, movement, and survival, and only 90% of energy goes to the next level

• the top of the pyramid is the pinnacle organism of an ecosystem

Producers obtain their energy by

• the process of hunting for prey

• the process of eating plants

• the process of photosynthesis to make their own food from sunlight

• the process of breaking down once living things

The job of decomposers in an ecosystem is to

• break down once living things from all levels of the ecosystem to recycle nutrients back to producers

• break down only top level consumers to recycle nutrients

• break down only producers to recycle nutrients

• give energy to all levels of the ecosystem

Carnivores get their energy by

• eating other animals

• eating plants

• eating both plants and animals

• breaking down once living organisms

Herbivores get their energy from

• eating other animals

• eating plants

• using sunlight to make their own food

• breaking down once living things

The carnivore level in this diagram are also known as

• Producers

• Primary consumers

• Secondary consumers

• Tertiary consumers

The herbivore level in this diagram are also known as

• Producers

• Primary consumers

• Secondary consumers

• Tertiary consumers

The shrew provides energy for the ...?

• cricket
• grasshopper
• frog
• snake

Which of the following is an herbivore?

• cricket
• frog
• hawk
• shrew

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

• 10%
• 50%
• 90%
• 100%