Indoor air pollution has increased as improvements have been made in A) heating and air-conditioning systems
B) radon-resistant construction techniques
C) energy conservation in the home
D) green building construction
E) all of these choices contribute to indoor air pollution

Which of the following explains why a tree is often used as a model to represent the principle of common descent

The lake of the ozarks is a human-made lake, so it collects runoff from coal strip-mining, fertilizers, resort wastewaters, and septic drainages. the average lake temperature is between 10∘c and 21∘c. consider the physical requirements for growth and multiplication that would allow fecal coliforms to “blossom” in the lake of the ozarks. which of the following would accurately describe these organisms? check all that apply. psychrophiles facultative halophiles extremophiles mesophiles hyperthermophiles

As a result of climate change earths temperature is rising and sea ice is melting what is a likely effect? answer : populations of walruses and polar bears will decline