Exam 23: Ecosystems and Populations

Major end products from photosynthesis include oxygen gas and simple, high-energy carbohydrates.

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

The process by which some bacteria convert nitrate to atmospheric nitrogen gas is called ________.

The biosphere is so large that, unlike the case of the more simple ecosystems, it is impossible to disturb the balances that exist in this ecosystem.

Which one of the following is represented by the calculation: (number of births - number of deaths)/total population?

Match each term to its definition. -the location of a particular organism; characterized by certain chemical and physical features

Match each term to its definition. -a community of organisms and the physical environment in which they live

The size of a population of a given species that can be indefinitely sustained by an ecosystem is its ________.

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

The point at which the number of births equals the number of deaths is called ________.

All of the red squirrels living on a college campus would be a(n)

With the exception of lipids, plants are capable of producing all the organic molecules they need using water and minerals from the soil and energy stored in the sugar molecules they make through photosynthesis.

Which one of the following statements accurately reflects the nature of mature communities?

During a murder investigation in your hometown, the crime scene investigation unit has discovered blowfly maggots developing on the body. As an amateur detective, you arrive on the scene just in time to explain to the investigators how the flies are serving as decomposers and carnivores at the same time. How is this possible?

Populations of species that occupy the same geographic area and interact with each other are collectively called a(n)

Match the following. -a human eating a dinner of broccoli, baked potatoes, and steak

Match the following. -a bee drinking nectar from a flower

The process by which there is a natural sequence of change in the type of organisms within a particular community is called ________.

Each chemical element cycles between three different pools of the biogeochemical cycle: the exchange pool, biomass, and reservoir. Match each of the following to the pool in which it would be classified. Answers may be used more than once. A) exchange pool B) biomass C) reservoir -carbon-containing compounds in fossil fuels

During photosynthesis, high-energy carbohydrates are produced during the ________.