2nd 6wks Exam (ES) rev. game, pt2

African elephant tusks consist of high-quality ivory. In recent years, the elephant population in certain African wildlife preserves has decreased. This decrease is most likely due to

• air pollution

• biocide use

• human exploitation

• introduction of Japanese beetles

Water makes up from 50% -90% of a living organism. Most of the rest of the mass consists of a variety of carbon-containing compounds. A valid conclusion that can be drawn from these statements is that living things are composed of

• both organic & inorganic matter

• inorganic matter only

• neither organic or inorganic matter

• organic matter only

Which of these human activities is quite often responsible for the other three human activities?

• increased demand on limited food production

• increasing levels of air pollution

• rapid increase of loss of farmland due to soil erosion

• rapid increase of the human population

Which statement regarding the ecosystem shown in the aquarium diagram is correct?

• A population within this ecosystem is the three snails.

• Cycling of materials is not necessary in this self-sustaining ecosystem.

• The community within this ecosystem consists of seven guppies & one catfish.

• The energy source for this ecosystem is the gas from the air stone.

The wrasse, a small marine fish, periodically cleans harmful parasites from the mouth & body of the moray eel. The moray, in turn, protects the wrasse from larger predators & provides it with a constant supply of food. This is an example of the type of relationship known as

• commensalism

• mutualism

• parasitism

• saprophytism

Which term describes all the individuals of any one species present in a particular environment?

• biosphere

• community

• ecosystem

• population

The acacia tree is protected from other insects by a certain species of ant. The ants, in turn, feed on a sweet secretion produced by the tree. This type of nutritional relationship is known as

• commensalism

• mutualism

• parasitism

• saprophytism

Endangered peregrine falcons have been bred in captivity & released in areas where pigeons & rodents are abundant. This activity is an example of

• conservation of resources & exploitation

• over-hunting & biological control

• species preservation & biological control

• species preservation & use of biocides

In Tennessee, bluebirds & sparrows inhabit nearly the same ecological niche. In many areas, bluebirds are being replaced by the sparrows as a result of

• competition

• equilibrium

• mutualism

• symbiosis

This diagram shows a lake ecosystem. Animal life is not included. The lake is divided into nine sections which are identified by the letter of the row and number of the column in which they are located. Which section represents a stage of the lake's succession into becoming a meadow more advanced than stages indicated in the other sections?

• A-2

• B-3

• C-1

• C-2