A: Nitrogenase
B: Protiase
C: Nitrate reductase
D: Both A and B
举一反三
- About ____ genes are essential to nitrogenase activity in bacteria, many of them needed for the synthesis, assembly, and insertion of the cofactors. A: 10 B: 15 C: 20 D: 30
- Both the host and guests should always be punctual for a social activity.
- All of the following are functions of TH1 cells EXCEPT: A: contributes to autoimmunity B: enhances APC activity C: enhances TC activity D: involved with delayed type hypersensitivity reactions E: protects against intracellular pathogens
- Which of the following statements about markets is most accurate? A: Markets are usually a good way to organize economic activity B: Markets are usually inferior to central planning as a way to organize economic activity. C: Markets fail and are therefore not an acceptable way to organize economic activity. D: Markets are a good way to organize economic activity in developed nations, but not in less developed nations.
- The ______ of plants and animals have largely influenced the history of both man and human species.
内容
- 0
A biologist must have a lot of knowledge about the life and ______ (behave) of both plants and animals
- 1
Cash payments to suppliers would appear on a statement of cash flows using the direct method as a(n) A: operating activity. B: debt activity. C: financing activity. D: equity activity. E: investing activity.
- 2
What resource plants do you know from this course?A. Grain plants, energy plants B. Aromatic plants C. Medicinal plants, drug plants D. Industrial plants and enviromrntal protection plants A: Grain plants, energy plants B: Aromatic plants C: Medicinal plants, drug plants D: Industrial plants and enviromrntal protection plants
- 3
Production costs of product Z vary depending on the level of activity. Costs recorded at various levels of activity have been as follows:What is the cost of 43 units? A: $2,400 B: $2,580 C: $3,225 D: $2,451
- 4
抗真菌药物 A: Chloroquine B: Ciprofloxacin C: Rifampin D: Zidovudine E: Econazole nitrate