Which of the following is the basis for one concern regarding the broad planting of BT-toxic crops? A. pollinating species will come to prefer BT-modified crops, and will leave non-GMO crops unfertilized
B. species of beneficial pollinators will develop a natural immunity to the BT toxins
C. BT-modified crops may kill pollinators, reducing crop fertility in seed and fruit crops
D. exposure to BT may turn insects into super insects, resulting in things like BT-toxic bee stings

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.