Even if a country has banned the use of DDT, the pesticide can still enter the country as it can be carried by vectors such as wind.
Answer the following statement true (T) or false (F)
True
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How could climate change affect spring feeding interactions between species?
What will be an ideal response?
You are asked to do a field study of a region of the Midwest United States that is thought to have once been covered by a glacier. Which of the following observations about the area would help confirm the hypothesis that a glacier once covered this region? (Check all that apply.)A) Local topographic maps show several moraines in the area.B) Historical weather records indicate the area experiences heavy snowfalls during the winter.C) Many farmers report encountering a layer of unsorted, rocky till material when plowing their fields.D) The local bedrock is mostly composed of fine-grained sandstones.
What will be an ideal response?
A 10-Hz wave has a period of
A. 100 s. B. 10 s. C. 0.1 s. D. none of the above
In hydrothermal vent communities,
A) there is no photosynthesis, but heat drives chemosynthetic producers. B) energy is transferred in the form of heat between trophic levels. C) temperature is the most important biotic factor. D) producers depend on energy generated by consumers.