Test your basic knowledge |

CLEP Biology: Principles Of Evolution

Subjects : clep, science, biology
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Homology was defined by Darwin as similarity of structure and position - and distinguished from 'analogy -' which was defined as similarity of _____________ but not necessarily of structure and position.






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






3. _________ evidence shows that the horse has undergone considerable evolutionary change over a period of 60 million years.






4. A comparative study of physiology and biochemistry also supports the common origin for different organisms. The _____________ of all organisms cells is more or less same in composition.






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






6. At the molecular level - life's ability to reproduce begins with the replication of ____________ - during which two new spirals are created that are exact replicas of the original molecule.






7. The Regional ___________ Hypothesis suggests that regional populations of H. erectus evolved into H. sapiens through interbreeding between the various populations.






8. A ___________ can be defined as one or more populations of interbreeding organisms that are reproductively isolated in nature from all other organisms.






9. 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 ___________ __________.






10. There are at least ___________ of animals. Humans are members of the phylum Chordata.






11. Despite their image as brutish simpletons - _____________were the first humans to bury their dead with artifacts - indicating abstract thought - perhaps a belief in an after-life.






12. About 1.8 million years ago - early Homo gave rise to _______ ________ - the species thought to have been ancestral to our own.






13. Homology has to be distinguished from ___________; for instance - the wings of insects and the wings of birds are analogous but not homologous.






14. _____________ is the end of a particular evolutionary line - the end of a species - a family - or a larger group of organisms.






15. In species which reproduce _____________ - extinction of a species is generally inevitable when there is only one individual of that species left - or only individuals of a single sex.






16. In a genetic drift the entire population may become homozygous for the allele or - equally likely - the allele may disappear. Before either of these fates occurs - the allele represents a Polymorphism. This is a case of polymorphism through...






17. ____________ reproduction - whether reproduction proceeds with lesser or greater success - is central to the process of natural selection; it determines whether a given mutation becomes established in the general population.






18. Some important structural changes during the evolution of horse are: Increase in size from 11' (Eohippus) to about 60' (Equus) - and ___________ of the head and neck so as that it can reach the ground.






19. Extinctions - mostly at the level of species - have been occurring constantly at a low 'background rate' - usually matched by the rate at which new species appear - with the result that ____________ is constantly increasing.






20. Such a dual level designation is referred to as a _________ nomenclature.






21. Scientific classification sorts living organisms by _________ levels of classification - kingdom; phylum; class; order; family; genus; and species.






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






23. ___________ 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.






24. As populations diverge - they form similar but related species. When are two populations new species? When populations no longer _____________ they are thought to be separate species.






25. The Neolithic transition - about 10 -000 years ago - involved the change from __________-__________ societies to agricultural ones based on cultivation of plants and domesticated animals.






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






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






28. ______________ struggle is the struggle of organisms against the physical environment.






29. _____________ struggle takes place between the individuals of the same species.






30. Most anthropologists agree that the ______ _______ was populated by a series of three migrations over the temporary land connection between Asia and North America.






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






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






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






34. As the finch population began to flourish in these advantageous conditions - ______________ competition became a factor - and resources on the islands were squeezed and could not sustain the population of the finches for long.






35. The most recent mass extinction - the K-T extinction at the end of the Cretaceous period - is best known for having wiped out the __________ .






36. The Linnaean system uses two Latin name categories - ________ and species - to designate each type of organism.






37. 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






38. An important step toward the modern theory of evolution came in the 1760's - when Count George-Louis Leclerc de Buffon (1707-1788) published his Natural History of Animals with the idea that species __________ over time.






39. Darwin's Finches illustrated ___________ ____________. This is where species all deriving from a common ancestor have over time successfully adapted to their environment via natural selection.






40. Jean Baptiste de Lamarck (1744-1829) developed one of the first theories on how species changed. Lamarck - in 1809 - concluded that organisms of higher complexity had __________ from preexisting - less complex organisms.






41. Almost all _________ organisms are either plants or animals.






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






43. _____________ can occur randomly - from radiation damage (impact with high energy g-rays or cosmic rays) - from exposure to chemical agents called mutagens - or simply by error in the DNA replication process.






44. At some time in their life cycle - chordates have a pair of lateral gill slits or pouches used to obtain __________ in a liquid environment.






45. The __________ kingdom consists of one-celled organisms as well - but differs from the Monera kingdom in that it consists of eukaryotes.






46. Homology is also seen in the structure of eye - brain - joint appendages of arthropods - etc. It is thus evidence for ____________.






47. Humans who have produced offspring that successfully live in a ________ environment tend to be broader and smaller in stature while hotter environments are occupied by thinner taller humans.






48. The mutation may be harmful (resulting in a reduced probability of survival for the organism involved) - ____________ (it might also do its intended job better) or merely neutral (no effect at all).






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






50. Immediately below kingdom is the _________ level of classification. At this level - animals are grouped together based on similarities in basic body plan or organization.







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests



Major Subjects

Tests & Exams


AP
CLEP
DSST
GRE
SAT
GMAT

Browse all subjects

Browse all tests

Most popular tests