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CLEP Biology: Principles Of Evolution
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CLEP Biology: Principles Of Evolution
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25 Questions

1. In general if two genes have an almost identical DNA sequence - it is likely that they are ____________.

2. The only kingdom which consists of prokaryotes is the __________ kingdom.

3. For humans - the complete classification is: Kingdom (Animalia); Phylum (__________); Class (Mammalia); Order (Primates); Family (Hominidae); Genus (Homo); Species (Sapiens).

4. ___________ is a specific explanation of similarity of form seen in the biological world. In genetics - it is used in reference to protein or DNA sequences - meaning that the given sequences share ancestry.

5. Darwin reported that all organisms tend to _____________ in a geometric ratio provided there are no environmental checks. Even slow breeding animals like the elephant may theoretically give rise to 19 million descendants in a period of 750 years.

6. ____________ organs are formed on the same basic plan though they may be modified variously to perform different functions. They must have a common ancestral structure which gave rise to different modifications.

7. Because organisms are continually tested by their changing ______________ - their forms change to suit new conditions.

8. Homo erectus was the first hominid to use ___________ - and have social structures for food gathering.

9. ___________ speciation happens when members of a population develop some genetic difference that prevents them from reproducing with the parent type.

10. The study of ____________ ____________ supports the claim of a common origin of organisms.

11. _______________ is that branch of biology dealing with the identification and naming of organisms.

12. Humans are ____________ - meaning we walk on two of our limbs. The amount of melanin in our skin is representative of the environment we live in - i.e. dark skinned people occupy hotter climates.

13. Populations begin to diverge when gene flow between them is restricted. Geographic isolation is often the first step in ____________ speciation.

14. _____________ is the accumulation of small changes in a gene pool over a relatively short period.

15. A Hardy-Weinberg equilibrium provides a ___________ by which to judge whether evolution has occurred.

16. A ____________ tree is a graphical means to depict the evolutionary relationships of a group of organisms.

17. Almost all living organisms use the same basic biochemical molecules - including DNA - ATP - and many identical or nearly identical enzymes. Organisms utilize the same DNA triplet base _________ and the same 20 amino acids in their proteins

18. According to Darwin - in spite of the high reproductive potential - the number of individuals in a species remains relatively constant - suggesting _____________ for existence.

19. About 2 million years ago - two groups developed: the australopithecines - generally smaller brained and not users of tools; and the line that led to genus _________ - larger brained and makers and users of tools.

20. _________ ______ disease causes anemia - joint pain - a swollen spleen - and frequent - severe infections. It illustrates balanced polymorphism because carriers are resistant to malaria - an infection by the parasite that causes cycles of chills and

21. Charles Darwin published a book The Origin of Species in the year 1859. He proposed that the new species came about by a process called ___________ __________.

22. Members of the phylum _____________ have soft - unsegmented bodies that are usually - but not always - enclosed in hard shells.

23. Mammals developed from primitive mammal-like reptiles during the __________ Period - some 200-245 million years ago.

24. Differential reproduction allows one species to gradually evolve into a new species. This is the process of ____________.

25. Animals and plants show variations in physical structure. Some of these variations are simply caused by external conditions (environmental) - such as accidents - temperature - food abundance - etc.. ___________ variations have no effect on evolution

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