If thick-shelled oysters are tougher to crack open than thinner-shelled oysters, crabs will be less able to prey upon them, and thick-shelled oysters will be more likely to survive and reproduce. This scenario is an example of

Small flies are easy prey for spiders and large flies are easy prey for woodpeckers. Medium sized flies tend to survive best. This is an example of

Structures which are similar enough to indicate common ancestry

The "survival of the fittest" or the idea that species with the best traits will survive and reproduce and the species with less favorable traits will die or not reproduce

The process through which new species are created

A structure that has no apparent purpose, but many provide evidence of past evolutionary forms

Structures which are similar in function, but do not provide evidence of common ancestry

What organism is most related to the lizard ?

What trait separates the pigeon from the mouse and chimp?

What type of structures are these forelimbs?

What type of structure are these wings?

Appendicitis's is the removal of ruptures appendix. The appendix is a sac of bacterial fluid that use to help break down raw meat. This organ is no longer useful to humans which is why removal is very common. What type of structure is this?

Type of isolation that prevents species from interbreeding due to physical distance

Type of isolation that some members of the population mate and reproduce at a different time or in a different seasons than the rest of the population

Type of isolation in which some members of the population have different courtships or mating behaviors such as songs or dances.

Type of isolation in which members of the population cannot mate with each other. Overtime, the members become so different that they can no longer mate and produce fertile offspring with the original population.

Which of the five dots in the tree above corresponds to the most recent common ancestor of a mushroom and a sponge

Which of the four trees below depicts a different pattern of relationship than the others?

The two species in the tree that are most closely related to each other are