Most fossils ____.
A. are found in sedimentary layers of rock
B. form without water
C. contain remnants of soft body parts
D. represent the least common species found in an area
E. have been formed by exposure to air
Answer: A
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The plant alkaloid ricin is nontoxic inside castor beans, but becomes active when digested by an animal. The toxic form of ricin kills by
A. inactivating the animal's immune system. B. over stimulating the animal's heart rate. C. inactivating ribosomes needed for translation. D. binding to RNA polymerase. E. releasing cyanide.
The green revolution affected Indonesia's food supply in a positive way. Comment on its effects on the country's ecological footprint
What will be an ideal response?
Which of the following statements about Bacillus anthracis is FALSE?
A) It is primarily a disease of humans. B) It produces endospores. C) It has a capsule. D) It normally dwells in the soil and can survive in the environment for centuries or longer. E) It can be lethal even after treatment because antimicrobial drugs do not inactivate accumulated anthrax toxin.
Lungs absorb oxygen from inhaled air, and the small intestine move ingested material through the
digestive tract and absorbs nutrients from ingested food. Which of the following statements describes the type of epithelium you would expect to line each of these surfaces? a. They are both lined by a simple squamous epithelium. b. They are both lined by a simple cuboidal epithelium. c. The lungs are lined by a simple squamous epithelium, and the small intestine is lined by a ciliated columnar epithelium. d. The lungs are lined by a columnar epithelium, and the small intestine is lined by a simple squamous epithelium. e. The lungs are lined by a simple squamous epithelium, and the small intestine is lined by a simple cuboidal epithelium.