Aparticular species of sea bird underwent a genetic mutation that resulted in big beaks. the larger size of beaks the bird to break open clams and other mollusks for food. it also them defend themselves against predators. after many generations, almost all of the organisms in the population have big beaks. for which two reasons did this phenomenon occur?

How will you manage your time to accomplish the necessary tasks both on the job and at home?

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

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.