The Importance of Trees — Unit test Answers

What percent of the trees cut down are used for something other than paper?a.35%b.45%c.55%d.65%

Which of the following is the most damaging method of soil remediation?a.soil excavation and disposalb.soil aerationc.heating and vapor extractiond.microbial digestion

Which of the following forest management practices is the most harmful to forest ecosystems?a.clearcuttingb.shelterwood cuttingc.group selectiond.single tree selection

Which of the following statements about forestry education is true?a.All educational facilities cover forestry to the same depth.b.Individuals can pursue doctorates in forestry in any state.c.Program focus will remain the same from state to state.d.Some states have greater access to forestry programs than others.

Which of the following statements about human impact on trees is true?a.Human activity always has a negative impact on trees.b.All human uses of trees require destruction of the trees.c.Human activity has had both a positive and negative impact on trees.d.Cutting down trees is the only activity that has a negative impact on trees.

Dutch agriculture is one of the most labor intensive types of agriculture in the world.

How do trees improve water quality?a.Tree roots anchor soil in place, preventing runoff.b.Water is filtered as it passes through the root systems of trees.c.An adult tree can store nearly 250 gallons of water.d.All of the above

The main characteristic of a carbon sink is that _______.a.it emits no carbonb.it absorbs no carbonc.it emits more carbon than it absorbsd.it absorbs more carbon than it emits

How do trees interact with other organisms? a. They provide mammals with food. b. They receive shelter from insects. c. They obtain food from other plants. d. All of the above Please select the best answer from the choices provided

Approximately how many plant made pharmaceuticals are currently under different stages of discovery?a.100b.200c.300d.400

Which of the following is true concerning pastoralism?a.It occurs in small areas of land with high yields.b.It occurs in forests and grasslands.c.It is a modern agricultural technique.d.It revolves around herding livestock.

Compare group selection to single-tree selection.

Every year one hundred trees remove approximately _______ from the atmosphere.a.five tons of carbon dioxideb.four hundred pounds of ozonec.three hundred pounds of particulatesd.all of the above

How has human use of trees had both a positive and negative impact?

Arboreal animals are animals that _______.a.rely on trees for foodb.live in treesc.are harmful to treesd.none of the above