Speciation, extinction, cladograms, niches and gradualism

Created April 2020, Offline version here
Videos by Paul Andersen. Visit his website: Bozeman Science.


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1. Type of speciation that refer organisms sharing the same niche.
2. Part of the ecosystem an organism lives, finds resources, and reproduces.
3. Plants commonly have this trait as a result of incorrect cell division.
4. Word describing that something is still in existence.
5. This signifies that the organism is extinct on a cladogram.
6. If an offspring cannot reproduce, it is known as this.
7. When one species branch into two species.
8. How many species result from speciation?
9. This type of extinction is when multiple extinctions happen at once.
10. A type of reproductive isolation barrier that refers to after the fertilization of the egg.
11. Type of speciation where the environment the organism lives in is geographically split and later remerges.
12. A type of reproductive isolation barrier that refers to before the fertilization of the egg.
13. This type of isolation refers to the incompatible anatomy of two organisms.
14. Organisms undergo this process as a result of environmental pressures.
15. This type of organism has a faster rate of speciation comparted to animals.
16. An example of this type of isolation is one bird’s mating song is not compatible with another female bird.
17. Asteroids have this element in abundance.
18. An organism is known as this when it does not exist anymore.
19. A type of isolation that refers to time.
20. How many types of geographic isolations are there?