When the Grand Canyon formed, many small mammal population were divided. Some members of the population were on one side and others are on the other, therefore, they were not able to mate with one another. Over time this separation and inability to mate with one another led to the emergence of new species. This type of speciation is called

A) sympatric speciation.
B) allopatric speciation.
C) parapetric speciation.
D) peripatric speciation.

All living organisms are composed of a. only one cell. b. at least 100 cells. c. at least three cells. d. one or more cells.

Diego conducted an experiment to find out what kind of ball bounces the highest when dropped from a five-foot platform. he used a golf ball, a tennis ball, and a soccer ball. he dropped each ball from the balcony once. diego recorded his observations after each drop. what can diego do to best improve the reliability of his results? a) drop each ball from the platform three more times b) record his observations in more than one unit c) write at least two scientific questions after the experiment is complete d) share his results with other people who have done similar experiments you for the !

Scientific evidence is most likely to be consistent if it is based on data from