Prairie grasses experience grazing herbivores, wildfires, droughts, deep snow, and blazing hot days in the summer

The prairie grasses alive today are descendants of those that have survived these challenges and thus must have ________ for such an environment.
A) endemism B) predation C) speciations D) adaptations


D

Environmental & Atmospheric Sciences

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The synthesis of a certain drug requires 4 steps. First three steps were relatively easy with percent yields of 97.1%, 94.3% and 92.8% respectively. However, the last step was very difficult with a percent yield of 72.7%. What was the overall percent yield?

A) 27. 9% B) 61.8% C) 72.7% D) 85.0%

Environmental & Atmospheric Sciences

In a structural basin, the beds dip ________.

A. away from the center of the basin B. toward the center of the basin C. all in the same direction D. at a small angle E. at a large angle

Environmental & Atmospheric Sciences

The scientific study of caves is known as

A) soda straw. B) ciselure. C) speleology. D) areology.

Environmental & Atmospheric Sciences

Which of the following is the most efficient form of irrigation?

a. flood irrigation b. center-pivot irrigation c. low pressure irrigation d. precision sprinkler irrigation e. micro irrigation

Environmental & Atmospheric Sciences