Crossing over, or recombination, is the exchange of chromosome segments between nonsister chromatids in meiosis. Crossing over creates new combinations of genes in the gametes that are not found in either parent, contributing to genetic diversity.
Answer:
No
Explanation:
Not all greenhouses have pest insects because there can be butterflies in a greenhouse to pollinate the plants and bees help pollinate too. There are some pest insects though such as the greenhouse white fly, Encarsia Formosa, and the mealybug
When members of the same species are geographically isolated over time they will start to differ because of multiple factors:
1. Climate
2. Relief
3. Vegetation
4. Competition
5. Size of the area (specifically referring to smaller islands)
All of this factors (if different) will require a change in the behavior of the species, change in color, change in size, adaptation towards the food source by changing the teeth/beak and thus the jaw structure (for the species that have them), develop a new strategy to hunt (if it's a hunter), or develop a new strategy for evading predators, maybe change the niche in the food chain if there's stronger competition.
