Ninety eight percent of marine species belong to which of the following?

A) Benthos
B) Fungi
C) Nekton
D) Plankton
E) Plantae


A

Environmental & Atmospheric Sciences

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Marker-assisted breeding allows

A) desired bacterial genes to be inserted into crops. B) beneficial animal genes to be inserted into crops. C) crop improvements without resorting to transgenic traits. D) plants that have been bioengineered to be easily identified in the field.

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Which of these is a major concern about human engineered global dimming strategies?

A. uncertainty about the effects B. reduction of snowfall in Siberia. C. increase in the summer monsoon rains over Asia and Africa D. mirrors in orbit would eventually fall and crash into cities

Environmental & Atmospheric Sciences

Which of the following least reflects environmentally ethical guidelines regarding ecosystems?

A. We should work with nature to sustain ecological integrity. B. We should live in ways that do the least harm to environmental systems. C. We should focus on the short-term because it's impossible to imagine the long-term. D. We should try to understand nature. E. We should emphasize nature's high intrinsic value.

Environmental & Atmospheric Sciences

If the path of polar wandering recorded on two continents is not the same, then we can say that

A) Earth's magnetic history has been very complex. B) at least one of the continents has moved. C) our radioactive dating techniques have been inaccurate. D) the continents have always been widely separated.

Environmental & Atmospheric Sciences