Which of the following is a function of the nervous system? a. increasing cellular respiration in muscle tissues b. producing lactic acid in fatigued muscle tissues c. signaling muscle tissues to contract d. releasing atp into contacting muscle tissues

Look at the images of different rocks. which rocks have a fine-grained texture? check all that apply. 1 2 3 4 5

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.