Which question can a dichotomous key answer? a: which species of cricket did you collect? b: do crickets chirp more when the weather is warmer? c: which species of cricket was most interesting to study? d: are crickets easier to catch then tadpoles?

After reading the paragraph below, answer the questions that follow. researchers have created a robot that has a very thin leg that is moved by cardiac (heart) cells contracting in unison. the robot, made of a polymer similar to that used in making contact lenses, is bathed in heart cells with supporting cells, which then attach to the robot and provide movement as they contract. all of the cardiac cells working together can cause the robot leg to move in a way that individual cells could not. this is an example of a. emergent properties of cells. b. energy flow through an ecosystem. c. adaptation. d. internal environment regulation.

The color of the fur is the genotypephenotype.the genetic combination of alleles that determine the fur color is called the genotypephenotype.

How did the work of farmers and breeders in england influence the work of charles darwin