How does the small size of a spore its function? a) spores can travel far. b) spores provide structure. c) spores fit into a cell. d) spores are specialized.

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?

Which measurement unit represents volume? liter kilometer square centimeter centigram

Which of these internal feedback reactions does not need your brain? oa. your leg jumping when it is hit by a reflex hammer b. your deeper breathing when you need more oxygen c. your body temperature rising when you have an infection d. your heart beating faster when you are in danger