#Question id: 15146
#Unit 8. Inheritance Biology
#Question id: 622
#Unit 1. Molecules and their Interaction Relevant to Biology
An enzyme-catalyzed reaction was carried out with the substrate concentration initially a thousand times greater than the Km for that substrate. After 9 minutes, 1% of the substrate had been converted to product, and the amount of product formed in the reaction mixture was 12 micromol. If, in a separate experiment, one-third as much enzyme and twice as much substrate had been combined, how long would it take for the same amount (12 micromol) of product to be formed?
#Question id: 17813
#Unit 7. System Physiology – Animal
#Question id: 23187
#Unit 13. Methods in Biology
#Question id: 12097
#Unit 10. Ecological Principles
The herbaceous plant Achillea lanulosa is widespread in the Northern Hemisphere. Phenotypic variation in the species has been extensively studied along an altitudinal gradient from sea level to over 3,000 meters. In California there is conspicuous variation in height; alpine plants are only several centimeters tall while those in the San Joaquin Valley may reach a height of 1.8 meters. Adaptation to different local environments also results in variation in physiological processes such as photosynthetic rate, resistance to cold, and the timing of dormancy.
Which of the following methods would be best to determine whether the phenotypic variation in Achillea lanulosa is due to genotypic variation?