Neurotransmitters (like acetylcholine) are required to conduct nerve impulses because the neurons do not physically touch each other or the cells on which they are acting.

Choose your favorite biome. List three concerns you have about the health and future of the biome. Find a piece of the Solutions Wall that relates to these issues and explain how they may address issues in your chosen biome.

What cell parts are involved with cell division?

What is happening when scientists use their five senses to learn new information? A. Making predictions B. Drawing a conclusion C. Forming a hypothesis D. Making observations

What stands for a dominant allele

Which statement about human genetics is correct? a. All humans have the same alleles but different genes. b. All humans have the same phenotypes but different genotypes. c. All humans have the same genes but different alleles. d.

Which description best matches an S wave

An educate guess about the meaning of the term "chlorophyll"

All BUT one of the phrases describe a function of the human skeletal system. That is A) allows for movement. B) protects internal organs. C) produces red blood cells. D) filters unwanted substances.

Why is it important for cell division to occur?

Which of the following is true about the hierarchy or organization of life? (Check all that apply) A. Changes at the lowest level can affect the more complex levels. B. Cells make up tissues. C. Cells are made up of macromolecules. D.