Essentials of Biology 4th Edition by Sylvia Mader ,Michael Windelspecht

Exercise 6

For question indicate the type of isolating mechanism described in each scenario. Key:
A) habitat isolation
B) temporal isolation
C) behavioral isolation
D) mechanical isolation
E) gamete isolation
F) zygote mortality
G) hybrid sterility
H) low F 2 fitness
A cross between two species produces a zygote that always dies.