Experiments with bacteria and __________ offered
solid evidence that deoxyribonucleic acid (DNA),
not protein, is hereditary material. Fill in the blank(s) with the appropriate word(s).
Answer: bacteriophage
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In this figure, the magnitude of the secondary response is due to ____________________
a. the presence of memory cells b. the presence of antibodies that remain in the body after a first-time infection c. the activity of killer T-cells d. antibodies introduced when someone receives a vaccination
The Dust Bowl of the 1930s was the result of destruction of ____
a. deserts b. chaparrals c. tallgrass prairies d. short-grass prairies e. temperate deciduous forests
Which of the following directly powers the ATP synthase?
a. carbohydrate metabolism b. NADH/FADH2 c. the proton gradient d. electron transfer
A mycologist visits your biology class and discusses her research on a particular fungus that lives on the bark of damaged spruce trees. She explains that the fungal hyphae of her research organism is heterokaryotic. You raise your hand and request that she define that word. Her correct response is
A. heterokaryotic means that each compartment of the hyphae contain two distinct nuclei. B. heterokaryotic means that the nuclei of each compartment of the hyphae are genetically distinct. C. heterokaryotic means that each compartment of the hyphae contains only one nucleus. D. heterokaryotic means that the nuclei of the fungal hyphae are genetically the same.