Repressor Ex. 1: Tetracycline Resistance
What will be an ideal response?
Bacterium that is resistant to tetracycline
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A soft drink manufacturer, notorious for making marketing claims that are deceptive but technically accurate, has released a new sports beverage. The advertisements for this beverage assert that it contains three grams of chlorophyll per bottle, which will give the user extra energy during exercise performed in direct sunlight. Naturally, you buy a bottle to test its ingredients, and you are able to verify that it does, in fact, contain three grams of plant-sourced chlorophyll. Have you finally caught the company in a lie?
a. Yes! Three grams of chlorophyll is insufficient to produce measurable amounts of energy. b. No; chlorophyll in leafy greens and sports drinks continues photosynthesis after ingestion. c. Yes! Sunlight will have no effect on the amount of energy derived from digested chlorophyll. d. Yes! Humans cannot metabolize the carbohydrates produced by photosynthesis.
List and describe the structures of virusesc What will be an ideal response?
The sex of the fruit fly Drosophila melanogaster is determined as follows: XX chromosomes give a female and XY give a male. The gene for bar eyes is recessive and located on the X chromosome. If two bar-eyed flies are mated, what percentage of the offspring will have bar eyes?
A. none B. 25% C. 50% D. 100%
Which evolutionary milestone is not attributed to the rise of seeds?
A. Appearance of flagellated sperm that swim to eggs B. Protection of female spores and gametophytes within the body of the sporophyte C. Development of the ovule D. Emergence of sexually different spores E. Trend toward reduced gametophytes