Biology glossary

organism that lives at temperatures between 60–80 °C

regulation of body temperature

dinosaur group ancestral to birds

a group of myosin molecules

developmental response to touch

directional growth of a plant independent of the direction in which contact is applied

directional growth of a plant in response to constant contact

two polymers of actin wound together along with tropomyosin and troponin

(also, ribcage) skeleton of the chest, which consists of the ribs, thoracic vertebrae, sternum, and costal cartilages

modified stem branch appearing as a sharp outgrowth that protects the plant

level of depolarization needed for an action potential to fire

level of depolarization needed for an action potential to fire

disc-shaped, membrane-bound structure inside a chloroplast where the light-dependent reactions of photosynthesis take place; stacks of thylakoids are called grana

aqueous space bound by a thylakoid membrane where protons accumulate during light-driven electron transport

gland located behind the sternum that produces thymosin hormones that contribute to the development of the immune system