Which of the following is the best definition of a compound? A compound is composed of molecules which contain atoms of two or more
different elements in a fixed ratio.

A substance that cannot be broken down into other substances by chemical
processes

A compound is a solution containing a solvent and at least two kinds of solute
molecules

A compound is composed of molecules which contain a fixed number of atoms.

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. albino x albino a) 1/4 chinchilla, 3/4, agouti b) 3/4 albino, 1/4 chinchilla c) all albino

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.

What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome