Exam 23: Ecosystems and Populations

As soon as a population achieves the replacement fertility rate of 2.1, the population will stop growing.

Climax communities generally exhibit the greatest species diversity.

Modern farming practices have advanced to the point where they have little impact on the balance of existing ecosystems in the area.

Trees undergoing photosynthesis in a mature forest can best be described as

The total living component of an ecosystem is its

A niche is the location within an environment within which a species lives.

The study of the relationship between living organisms and their physical environment is called ________.

In which one of the following geographic locations is the climax community characterized by the presence of large slow-growing deciduous trees?

It is more accurate to use a food web rather than a food chain to depict the complex nature of an ecosystem because most organisms use more than one species as a source of food and most organisms are preyed upon by more than one species.

The phosphorus cycle is unique from nitrogen and carbon in that it

Which one of the following is TRUE regarding an ecological pyramid?

According to the second law of thermodynamics, when energy is converted from one form to another, some of that energy is transformed into heat energy, which is generally released from the "system."

The rapid growth of the human population still seen today began in the

The number of offspring produced by each reproducing member of a species, the ratio of males to females and the time it takes offspring to become reproductively mature are determinants of the ________ of a population.