Herbicide-resistant genetically engineered crops have contributed to A. Predictable genetic and ecological effects
B. Herbicide resistant super weeds
C. A decrease in toxins found in vegetables
D. Stability in the market for food crops
E. An increase in diversity of foods that can be grown

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

Use this dichotomous key for insect identification to identify the insect shown. 1. a. insect has one pair of wings. order diptera b. insect has two pairs of wings. go to #2 2. a. front wings thicker in texture than hind wings go to #3. b. front and hind wings are same texture throughout. go to #4 3. a. front wings are short order dermaptera b. front wings cover entire abdomen order coleoptera 4. a. wings with scale on all parts of their area. order lepidoptera b. wings without scales go to #5. 5. a. hind wings smaller than front wings. order ephemeroptera b. front and hind wings nearly equal in size. order odonata the insect pictured is in the order diptera. ephemeroptera. coleoptera. odonata.

Explain why ecosystem diversity results in species diversity in a healthy biosphere