What system is made up of the nose, pharynx, trachea, lungs, bronchi, and alveoli. circulatory endocrine immune respiratory

Vegetation that grows along the floors of tropical and temperate forests is called undergrowth. how is the undergrowth of a tropical rain forest most likely to differ from the undergrowth of a temperate forest? a. a tropical rain forest's undergrowth most likely experiences periods of dormancy during colder weather. b. a tropical rain forest's undergrowth most likely experiences periods of dormancy during rainy weather. c. the undergrowth of a tropical rain forest most likely requires less sunlight. d. the undergrowth of a tropical rain forest most likely requires more sunlight.

What is the next step in muscle contraction after the actin changes shape? (apex)

What maintain homeostasis when a persons internal body temperature is 97.5°f