Which of the four muscular chambers of the human heart directly propels blood into the pulmonary circulation?
A) right atrium
B) right ventricle
C) left atrium
D) left ventricle
Answer: B
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Which type of communication mechanism travels the best in water?
a. Sound b. Smell c. Taste d. Sight e. All of these choices travel equally as well.
The sphincter between the esophagus and the stomach serves to ________
a. produce digestive enzymes b. generate peristalsis to propel food c. block the flow of substances when it is contracted d. produce bile
Rats
a. are carriers of human pathogens. b. spread bubonic plague via infected fleas. c. infest rice fields, significantly reducing the yield. d. cause billions of dollars of annual economic loss. e. do all of these.
You discover a new sunflower that has blue flowers instead of yellow. When you cross this blue variety with a common yellow variety you get blue and yellow speckled flowers. What type of inheritance pattern does this gene exhibit?
A. sex-influenced dominance B. either incomplete dominance or codominance C. simple Mendelian inheritance D. codominance E. incomplete dominance