Make a line plot superimposed on the h-r diagram that would trace the entire life cycle of our star, the
sun. remember all of the stages of this main-sequence, low mass star.

Use this diagram of an animal cell to answer the question. where does the first stage of cellular respiration occur? w x y z

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Anne, an intern in a microbiology lab, was observing the characteristics of various specimens of protists. match each specimen to the category of protist to which it belongs.