12 - A piece of liver and a piece of bread are both crushed and mixed with water. A sample of
both is added to THREE test tubes, A, B and C.
Salivary amylase is added to Test tube A and pepsin is added to Test tube B
Describe what would happen to the liver and the bread in EACH test tube. A and
B.
Test tube A

Test tube B

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population. b) the separated population is small, and genetic drift occurs. c) the isolated population is exposed to different selection pressures than the ancestral population. d) different mutations begin to distinguish the gene pools of the separated populations. e) gene flow between the two populations is extensive.