I believe that your answer would be <span>b. how we perceive low-pitched sounds; how we perceive high-pitched sounds.</span>
2 Sodium fluoride is the answer
Answer:
Wash your hands before eating , or touching your eyes , nose or mouth.
Explanation:
Wash your hands after touching anyone who is sneezing , coughing or blowing their nose . Don't share things like towel , lipstick , toys or anything else that might be contaminated with respiratory germs.
Answer:
d. synapse
Explanation:
Synapse, also called neuronal junction, the site of transmission of electric nerve impulses between two nerve cells (neurons) or between a neuron and a gland or muscle cell (effector). A synaptic connection between a neuron and a muscle cell is called a neuromuscular junction.
Nucleus of cell, ribosome, nucleus of an atom , human cell
