____________ is the role or position a species has in its environment

In the food web shown, which of the organisms are herbivores?

Referring to the figure, suppose 10 000 units of energy are available at the level of the grasses. What is the total number of energy units lost by the time energy reaches the owl?

What type of cycle is shown in the figure?

A(n)___________ is made up of interactions among the populations in a community and the community’s abiotic factors.

In the energy pyramid, which level has the smallest number of organisms?

__________ are organisms that use energy from the sun or energy stored in chemical compounds to manufacture their own nutrients.

Which of the following describes energy and matter in ecosystems?

The group of animals in the figure is an example of which level of ecological organization?

The symbiotic relationship occurs in lichens is _________.

Any close and long-lasting association among organisms of different species is called __________.

In the pyramid of energy, less energy is available in the second level because _____.

Which organism shown in the pyramid receives the highest percentage of energy from the Sun?