A tomato plant is devastated by tomato wilt, a type of fungus that infects the soil with spores and returns every year to attack more tomato plants. One effective way to combat this fungus using ecological/cultural pest control is to
A) keep dead tomato plants from the prior year around to try to divert the fungus to the dead plants.
B) spray a broad-spectrum insecticide over your garden before and after the crops come up.
C) plant something other than tomatoes in this part of the garden next year.
D) rake the soil before planting next year's tomatoes.
C
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Which of the following is not true about protecting biodiversity?
A) Once a species is lost from an area, it isn't typically re-introduced because doing so would endanger other species in that ecosystem. B) The mining industry exerts a serious threat to biodiversity. C) Gene and seed banks provide insurance for the long-term survival of species. D) The cultivation of densely planted energy crops grown in tropical ecosystems to provide biofuels is a threat to biodiversity.
Compare and contrast placental mammals, marsupials, and monotremes. What will be an ideal response?
Humus:a
is the material always comprising the topmost soil horizon. b. is dark, organic-rich material formed by bacterial decay. c. is leaf-litter. d. must include sediments. e. none of the above
The primary factor which determines what type and how much radiation an object emits is its:
A) color. B) density. C) conductivity. D) temperature. E) size.