Directions (1-17): Each question is followed by four choices. Decide which choice is the best answer. Mark your spaces provided on the separate answer sheet by writing the number of the answer you have chosen. Which part of a cell allows nutrients and other materials to enter or leave the cell? 1 cytoplasm 2 nucleus 3 chloroplast 4 cell membrane 2 Which human body system controls production of the hormones that regulate body functions? 1 digestive 2 endocrine 3 respiratory 4 skeletal 3 Hereditary information is found in a cell's 1 chloroplasts 2 chromosomes 3 cytoplasm 4 membranes 4. What is a major cause of variation within a species? 1 sexual reproduction 2 asexual reproduction 3 extinction 4 photosynthesis 5 Which process is shown in the diagram below? A C Sperm Egg 1 metamorphosis 2 regulation 3 fertilization 4 respiration

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