Unit Test — Unit test Answers

Which of the following is not a food produced in rainforests?a.coffeeb.cocoac.avocadosd.mustard seeds

Mycorrhizal fungi are _______. a. mutualistic root-dwelling fungi that help plants obtain more water and nutrients. b. mutualistic leaf-dwelling fungi that obtain sugar from plant leaves c. parasitic leaf-dwelling fungi that strangle plants d. epiphytic plants living on plant stems and leaves Please select the best answer from the choices provided

Why is volcanic soil (andisol) very fertile?a.It is rich in minerals from volcanic deposits.b.It is a young soil with low water retention.c.It has been leached of mineral nutrients.d.Volcanic activity warms the soil.

Why might soils rich in organic matter not be fertile?a.Soil fertility comes from a balance of organic matter and other mineral nutrients.b.Large amounts of organic material make soil retain too little water.c.Soil fertility is a result of the inorganic minerals present.d.Soils rich in organic material are always highly fertile.

Soil compaction results from _______.a.the reduction or elimination of pore space in soilb.the weight of heavy machinery on soilc.livestock walking over soild.all of the above