The correct answer to this question is "Including a control group that did not receive the supplement." This is the change in this study that would do the most to increase Reynaldo's confidence that sound scientific practices were followed. It would help them distinguish the effect of the drug and other factors which might have influenced the study. Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help.
The correct answer to your question is C. SY,SY, SY and SY.
Answer:
Plant pigments are important in controlling photosynthesis, growth and development of plants
Explanation:
Chlorophylls are the source of green in all fruits and function as the primary pigment to capture yellow and blue lights for photosynthesis to produce energy for plant development and growth.
Answer:
leaf
Explanation:
The leaf of each data value in a stem and leaf plot is determined from the rightmost digit of each number.
The answer is B. Enzymes work best within a narrow pH range. High pH levels can denature the enzyme.