form an analogy between the canaries used in coal mines and the lichens living in tundra ecosystems. Be sure to use and define the term bioindicator in your respnse.

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

Select the true statements about eubacteria. most live as decomposers and heterotrophs. most only thrive in a narrow range of environments. certain eubacteria are responsible for food poisoning. eubacteria thrive in extreme environments.

Explain how light energy is turned into chemical energy? ! due tomorrow!