Within any ecosystem, there is a fixed amount of energy available for organisms to use. Since organisms usually produce more offspring than a given ecosystem can support, this causes . A. bottlenecking
B. genetic drift
C. parasites
D. competition

Indicate whether the following statements about the biases in the fossil record are true or false. a) inland species are more likely to be preserved than marine species b) organisms with hard body parts are more likely to be preserved than are those composed soft tissues. c) species that existed over a larger area are more likely to be preserved than species existing over a smaller area. d) organisms that lived very long ago are more likely to be found as fossils than organisms that lived relatively recently e) the fossils of larger organisms are more likely to be found than the fossils of smaller organisms

Which term describes a normal value for something in the body? a.homeostasis b.set point c.feedback loop d.integration center

Which greenhouse gas is emitted when burn fossil fuels for energy? a.nitrogen b.oxygen c.carbon dioxide d.helium