growing parts of a plant, such as roots and young leaves, which require photosynthate

the heart’s internal pacemaker; located near the wall of the right atrium

tubular structure that serves as an inlet for water into the mantle cavity

forms skeletal muscles, which attach to bones and control locomotion and any movement that can be consciously controlled

bone that supports the structures of the face and protects the brain

ring-shaped protein that holds the DNA pol on the DNA strand

organ where digestion of protein, fats, and carbohydrates is completed

molecules synthesized by RNA polymerase III that have a variety of functions, including splicing pre-mRNAs and regulating transcription factors

region of the endoplasmic reticulum that has few or no ribosomes on its cytoplasmic surface and synthesizes carbohydrates, lipids, and steroid hormones; detoxifies certain chemicals (like pesticides, preservatives, medications, and environmental pollutants), and stores calcium ions

occurs in the walls of hollow organs such as the intestines, stomach, and urinary bladder, and around passages such as the respiratory tract and blood vessels

outer loose layer that covers the surface of Earth

vertical section of a soil

amount of solar power energy the sun emits in a given amount of time

substance dissolved in a liquid to form a solution

substance capable of dissolving another substance