Imagine a field of monkey flowers. Some of them are pink and others are red. It turns out that the pink flowers are pollinated mostly by bumblebees, whereas the red flowers are pollinated mostly by hummingbirds. As a result pink flowers are fertilized mostly by pollen from other pink flowers, and red flowers are fertilized mostly by pollen from other red flowers. The pink and red flowers have become separate species.  What type of speciation is this?  Sympatric speciation type  (my answer) What mechanism of reproductive isolation was involved?

Which of these is an example of a key innovation?   A caterpillar of a butterfly species provides honey to an ant colony in order to receive protection and care.   A founding population of honeycreepers evolves beaks capable of cracking the seed of a tree species in their new habitat.   A new flower color morph arises in a plant population, but an associated pollinator does not distinguish flowers by color.   Co-occurring diploid species of wheat and goatgrass hybridize to form a viable tetraploid offspring that can no longer breed with its parents.

An F, generation is the result of which mating described below? Select one: O a. Randomly mating any two parents of opposite sex together. cross out O b. Mating a true breeding female to a true breeding male. cross out O c. Mating the offspring of an F, generation back to their parents. cross out cross out O d. Mating any F, male to any F, female. cross out O e. Allowing the individuals from a single F, generation to mate among themselves. Clear my choice

Wild type fruit flies have red eyes and normal wings. You crossed a male from a pure-breeding, purple-eyed, broken-winged line of fruit flies to a female from a pure-breeding, red-eyed, normal-winged line of fruit flies. All the F1 progeny were wild type. The reciprocal cross gave the same result. The F1 flies from the first cross were mated to produce an F2 population. If there were 528 flies in the F2 population how many would be purple-eyed and normal winged? 396 264 297 99 352