How do segment polarity genes relate to pair-rule genes?
What will be an ideal response?
Segment polarity genes are controlled by transcription factors encoded by the pair-rule genes.
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A gram-negative diplococcus grew on 5% sheep blood agar and chocolate agar, had scant growth on MacConkey agar, and had no growth on modified Thayer-Martin (MTM) agar. The organism was identified as N. sicca. Which one of the following statements explains the discrepancy of the results obtained on the MTM agar?
a. The medium was most likely expired. b. The organism was most likely incorrectly transported. c. The organism was most likely incubated at 35°C instead of 25°C. d. No discrepancy is present. N. sicca does not grow on MTM agar.
Which of the following is false?
a. Flowers often exhibit coevolution with their pollinators. b. Seeds often exhibit coevolution with their disseminators. c. The pollen grain forms from a haploid microspore. d. Megaspores are part of the female gametophyte generation. e. Megaspores and microspores arise through mitosis
DDT is a(n)
a. blight that affects American chestnut trees. b. endangered plant species. c. pesticide. d. wildlife refuge area in Yellowstone National Park.
The condition in which there is deterioration of the
myelin sheaths of neurons in the brain and spinal cord is a. muscular dystrophy. b. cancer. c. diabetes. d. multiple sclerosis. e. Alzheimer’s disease.