During an experiment, a scientist observed prokaryotes that lived near the volcanic vents deep in the ocean. the scientist most likely observed a. photoautotrophs b. chemoautotrophs c. heterotrophs d. photoheterotrophs

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. chinchilla x chinchilla 1/2 agouti, 1/2 chinchilla 3/4 agouti, 1/4 chinchilla all chinchilla