What is an abiotic factor?

What can be found in every skeletal muscle? a. nerves, bones, cartilage, and connective tissue b. tendons, cartilage, nerves, and blood vessels c. muscle fibers, nerves, connective tissue, and blood vessels d. tendons, nerves, blood vessels, and bones

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

According to the cladogram, which organisms have roundworms as a common ancestor?