Which is true of genes?

They are proteins that produce sections of DNA which control the cell's activities.

They are the same as traits which show up in an organism if they are dominant.

They are features that can be observed rather than measured.

They are sections of DNA that produce the proteins that control an organism's characteristics.

New york city has 2,181 inhabitants per square mile. the state of alaska has 1.03 inhabitants per square mile. ecologists would say alaska has a low exponential growth population density birth rate carrying capacity

The fish shown above is a tarpon. it is a fast-swimming and powerful open-water fish. its closest relatives, oddly, are burrow-dwelling conger eels that stay on the bottom. both eels and tarpon developed from snake-like larvae that float in the plankton during the first stages of life. once they mature, tarpon and eels are not found near one another in the ocean. the tarpon and the eel illustrate all of the following except

Isotopes of the same element have differ in their