Solar power plants that use a central receiver system or a distributed receiver system generate energy by
a)heating an oil or salt solution
b)splitting atomic nuclei
c)tracking the sun's motion
d)using the photoelectric effect

The diagram illustrates the activity of vesicles during a cellular process.

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming