Electromagnetic radiation is used in the lab to mutagenize bacteria. Which type of wavelength do you think is used for this purpose?
A) Gamma rays and X rays
B) Ultraviolet light
C) Visible light
D) Infrared light
B) Ultraviolet light
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In a root nodule, the gene coding for nitrogenase _____
A) is inactivated by leghemoglobin B) is absent in active bacteroids C) is found in the cells of the pericycle D) protects the nodule from nitrogen E) is part of the Rhizobium genome
Which of the following is a typical source of nutrients and water for developing amniote embryos?
a. squalene b. bone c. keratin d. collagen e. albumin
Which structure is common to both prokaryotic and eukaryotic cells?
A) Nucleus B) Ribosomes C) Chloroplasts D) Mitochondria
You are out working in your garden, and you notice that one of your favorite flowering plants has black, dead spots on the leaves. You immediately suspect that the plant has been invaded by a pathogen and has initiated a(n) _____
A) avirulence response B) hypersensitive response C) resistance response D) virulence response