Exam 37: Communities and Ecosystems

Mistletoe is a plant that grows in the branches of other trees.Its roots penetrate the bark of the tree obtaining water and nutrients from the tree.This is an example of:

The energy requiring process by which liquid water becomes water vapor (a gas)is:

When two or more species vie for the same limited resource _____________________ occurs.

A network of interconnected food chains is a food web.

figure 37.19 -What is the dependent variable in figure 37.19?

Why are keystone predators like lions and eagle so rare in a community?

Which of the following is not an important biogeochemical cycle on Earth?

A type of symbiosis in which one member of the relationship benefits and the other is harmed is:

Lichens and mosses that can grow on and erode rock would be considered pioneer species.

The concentration of the pesticide DDT would be lowest in which of the following?

An insect that resembles leaves is using ___ to avoid predation.

Abiotic components of an ecosystem include:

figure 37.20 -What did the scientists conclude from figure 37.20?

The _____________________ cycle begins with the weathering of rock.

The concentration of the pesticide DDT would be highest in which of the following?

The term abiotic means "nonliving".

Parasitism is a symbiotic relationship in which neither member of the relationship benefits.

A ________________________ makes up a small portion of the community by weight,yet exerts a disproportionate influence on community diversity.

Which of the following is not a type of symbiosis?

The adaptations in Pseudomyrmex species and acacias suggest that the two species ______________.