Exam 2 Crossword

9. likely not responsible for current changes in climate patterns
13. begins after gene flow is disrupted between populations
16. can cause species to be exposed to changing environmental conditions over time as a result of plate tectonics
17. result when two species cannot avoid competing with each other
18. form of parasite that consumes or kills its host as it emerges (like in 'Alien')
19. creates habitat for other species
21. hybrids are sterile which reinforces speciation
22. necessary process performed by biodiversity which would be prohibitively expensive if humans had to perform it through technology

1. species which are all dangerous but gain shared protection by resembling each other
2. energy available for higher trophic levels
3. one species improves habitat conditions allowing other species to colonize the habitat but itself does not benefit from these species
4. top-down trophic interaction which can increase community diversity by changing resource availability
5. range of biotic and abiotic conditions that can be occupied by a species
6. gaseous element or molecule that absorbs and then re-radiates infrared energy
7. rates of this vary with temperature and moisture and oxygen availability
8. selection favors phenotypes which can avoid competition allowing multiple species to coexist
10. two species exploit a habitat differently so they do not encounter each other
11. can be explained by adaptive radiation or mass extinction or lack of time resolution in fossil record
12. can prevent competitive exclusion allowing species to coexist
14. isolating mechanism that prevents hybrids from forming
15. cold nutrient-rich water being brought to the surface by strong offshore winds or the Coriolis effect
20. two populations which are reproductively isolated from one another