9. Question #1: A student & a bean plant both need energy to carry out life functions. How is the student’s energy source different from the bean plant’s energy source? A. only the student can use energy from sunlight B. only the plant can use energy from water vapor C. only the plant can use energy stored in soil molecules D. only the student can use energy stored in fruits & vegetables Question #2: The products of photosynthesis become the reactants in: A. dehydration synthesis. B. the electron transport chain. C. aerobic cellular respiration. D. meiosis & mitosis.

11. Question #1: Which of the following statements about enzymes is true? A. enzymes cannot change during a reaction B. enzymes are not consumed in a reaction C. enzymes can bind to any substrate D. enzymes can only be used once in a reaction Question #2: Humans use their teeth to tear food into smaller pieces. How is this process different from the way enzymes function in the digestive system? A. Enzymes act on substances other than food. B. Enzymes alter food chemically instead of physically. C. Enzymes provide the energy that fuels the teeth’s activities. D. Enzymes are destroyed in the process of assisting digestion.

27. Question #1: A student eats lunch & then feels a renewed source of energy. Which systems of the body are most responsible for this process? A. digestive & excretory B. digestive & circulatory C. excretory & circulatory D. excretory & endocrine Question #2: Which system in a fish allows maximum oxygen intake through contact between the fish & its environment? A. respiratory system B. endocrine system C. reproductive system D. excretory system

32. Question #1: Vascular plants transport nutrients through specialized structures called xylem & phloem. What is the purpose of the xylem? A. They take water & nutrients from the soil. B. They move water & nutrients from the root through the plant. C. They capture the sun’s energy to make sugar. D. They move sugars & other nutrients from the leaves to the roots.

33. Question #2: A plant with a seed shaped to float on wind currents is utilizing the wind to help it with which task? A. growth B. adaptation C. reproduction D. development

35. Question #1: Which of the following terms best describes a group of organisms that can successfully reproduce with each other? A. an ecosystem B. a species C. a community D. a population Question #2: Complex transport tubes which move water, nutrients, & sugar throughout some plants belong to what level of organization? A. organelle B. cell C. tissue D. organ

39. Question #1: Internal feedback mechanisms maintain homeostasis by doing which of the following? A. making adjustments in response to input B. keeping internal processes working at a consistent rate C. predicting how external changes will affect internal conditions D. altering the external environment to meet the organism’s changing needs Question #2: How do the kidneys maintain homeostasis? A. by absorbing nutrients B. by preventing infection C. by removing liquid wastes D. by digesting proteins