Seeds contain all of the following EXCEPT
A. stored food.
B. sufficient water for germination.
C. an embryo sporophyte.
D. a seed coat.
Answer: B
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The arabinose operon (ara) provides a particularly interesting example of _____ in that when arabinose is present in the environment, the operon is transcribed
A) positive control B) negative control C) push forward control D) reverse transcription E) positive translation
Identify the following reaction: Lactose + H2O Glucose + Galactose
a. Dehydration synthesis reaction b. Hydrolysis reaction c. Exchange reaction d. Reversible reaction e. Ionic reaction
Which of the following storage methods do not inhibit bacterial growth?
A) Preventing contact between food and rats B) Allowing contact between food and flies C) Temperature (either hot or cold) D) Chemical preservatives
Low contrast specimens are made easier to see by
A) increasing the amount of light passing through the slide. B) using dyes that react with their structures. C) adding color filters to the microscope. D) using smaller aperture lenses. E) drying them in a vacuum.