Living things share many basic characteristics and needs. One characteristic is the need to maintain the internal conditions of their bodies, even if outside conditions change. Maintaining involves controlling the balance of water and minerals in the body, responding to changes in the environment, and controlling metabolism. homeostasis

cellular organization

heredity

metabolism

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.

Which best describes the nucleus of an atom a. it is where all of the particle s of the atom are located b. it is the negatively charged part of the atom c. it is where the electrons and the protons are located d. it is the part of the atom with the greatest mass

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?