Which one of these is not an example of intracellular communication?
a. a signal is translated to cause muscle contraction.

b. a muscle cell action is coordinated.

c. a muscle cell maintains homeostasis.

d. a nerve cell stimulates a muscle cell to contract.

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

geologic time scale (for gradpoint) =)

answer; civil inattention;