A professor of environment studies at the University of Nebraska, I was alarmed to discover that local farmers are increasing their use of pesticides on wheat fields. While these chemicals help get rid of the insects that damage the crops, they also cause great harm to butterfly and honey bee populations.

Long term exposure to waves can cause sunburns and skin cancer.

With regard to enzymes, key is to lock as a) substrate is to activation energy eliminate b) product is to substrate. c) enzyme is to active site. d) substrate is to active site.

The image shows the evolution of a species of fish. a few fish from a population developed different social behaviors and evolved into different species. two fish according to the image, the fish underwent . the new species of fish had mating seasons that were different from that of the original fish. because of the differences in mating seasons, the fish underwent reproductive isolation. this mode of isolation would be .