When scientists used flaps on the same plant to make observations of water flow they were attempting to remove the possibility of:
A. artificial results
B. experimental variation
C. differentiated results
D. separation factors
E. alignment factors
B. experimental variation
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Genetically modified food has raised some concerns because
A. it contains radioactive particles. B. it may contain some unanticipated allergens. C. it may have some unintended environmental effects. D. the modified DNA may transfer to other organisms. E. it may contain some unanticipated allergens, it may have some unintended environmental effects, AND the modified DNA may transfer to other organisms.
Plastic pollution is considered by many scientists to be:
a. a minor nuisance. b. biodegradable. c. of lesser importance than oil or toxins. d. of equal importance to oil and toxins. e. a problem best left for the next generation to deal with.
Which of the following are protein foods that are complete?
a. hamburger b. beans c. corn d. rice e. more than one of these protein foods are complete
All arthropods have:
a. six legs and three body segments. b. a chitinous exoskeleton and jointed appendages. c. antennae and compound eyes. d. stinging mouthparts. a mantle and a radula.