Which of these is an example of behavioral isolation? the frog species rana aurora breeds in fast–moving streams, whereas its relative rana catesbiana breeds in still ponds. two species of pines, pinus radiata and pinus muricata, grow together in california, but pinus radiata sheds its pollen in early february and pinus muricata in april. two species of crickets, gryllus rubens and gryllus texensis, have different courtship songs which can be identified only by the opposite sex of their own species.

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a. one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b. one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c. one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.