Students in a biology class ran an experiment on a type of flowering plant. their goal was to find the optimal time in the plant's life for flowering. what time period will provide the most flowering plants? use table 1-1 to determine your answer. day number of plants flowering 2 6 4 12 6 18 8 22 10 8 a 8–9 days b 7–8 days c 5–6 days d 6–7 days

14. which of the following codons code for threonine? a. ucg b. ugu c. cga d. aca

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Match each description with the correct form of energy. 1. energy of an object's position above the ground. 2. stored in the bonds of atoms and molecules 3. stored in the nucleus of an atom 4. energy of vibrating molecules 5. movement of objects used to do work 6. created by vibrations in electric and magnetic fields chemical energy mechanical energy heat gravitational energy light nuclear energy