What stage is the first stage of speciation? a. the populations become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring. b. the populations are isolated and thus do not interbreed. c. the populations become totally separated from one another. d. the populations successfully interbreed.

If equal masses of the listed metals were collected , which would have a greatest volume ? a. aluminum 2.70,b.zinc7.14,c.copper 8.92,d.lead 11.34

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

What three natural resources are found in the great lakes region