You are hiking in a forest and happen upon a plant featuring a central stemlike structure from which sprout many, tiny, leaflike structures. Which of these would be the most certain means of distinguishing whether it was a true moss, or a club moss?
A) its color
B) its height
C) if seeds are present
D) if conducting tissues are present
E) the appearance of its spore-producing structures
Answer: E) the appearance of its spore-producing structures
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Where in the cell does the Calvin cycle occur?
a. Mitochondria b. Ribosomes c. Nucleus d. Chloroplasts
At one time it was thought to be impossible to operate within the body cavities. Then the Canadian doctor, William Beaumont, operated on a patient with a gunshot wound to the stomach. A few decades later came breakthroughs in heart operations and transplants. The 1990s was called the decade of the brain because of the extensive research being done on how the brain functions. Name the body cavities associated with these breakthroughs in order.
A. abdominal-dorsal-thoracic. B. abdominal-thoracic-dorsal. C. thoracic-dorsal-abdominal. D. thoracic-abdominal-dorsal. E. dorsal-thoracic-abdominal.
Which of the following produce enzymes such as superoxide dismutase
A. Facultative anaerobes B. Obligate anaerobes C. Obligate aerobes D. There is more than one correct answer
Extracts of pathogenic bacteria can transform harmless bacteria to harmful bacteria unless ____ enzymes are added to the extract.
A. protein transfer B. mRNA-degrading C. tRNA-degrading D. DNA-degrading E. nucleic transfer