Which of these is part of the human microbiome?, A. Molecules, B. Bacteria, C. Glucose, D. Proteins, Which two molecules are needed for cellular respiration?, A. Oxygen + glucose, B. Oxygen + amino acids, C. Carbon dioxide + water, D. Amino acids + glucose, Which body system carries glucose and oxygen to cells?, A. Digestive, B. Respiratory, C. Circulatory, D. Skeletal, A scientist draws a scale drawing of a microorganism. In real life, the microorganism is 4 micrometers long. The scale is 1 micrometer = 2 cm. How long should the microorganism be in the drawing?, A. 2 cm, B. 4 cm, C. 8 cm, D. 10 cm, What do you think will happen to a student's heart rate after doing exercise, compared with before?, A. It will be faster, B. It will be slower, What do you think will happen to the student's breathing rate after doing exercise, compared with before?, A. It will be faster, B. It will be slower

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