Crabs are organisms that have five pairs of legs. In certain species of crabs, the fifth pair of legs has a flattened, paddle-like shape. Which of the statements below best explains how this adaptation has evolved? A. Crabs were exposed to a toxin in the water.

B. Crabs with this adaptation have an advantage over other crabs to defend against predators in oyster beds.

C. Crabs needed this adaptation to dig into sand to find food so they developed the flattened paddle-like shape.

D. Crabs developed this adaptation because they needed to climb mangrove trees to hide themselves from predators.

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

Give the orbital configuration of the phosphorus (p) atom.

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced. be sure your answer has the correct number of significant digits.