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






2. 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 ___________ __________.






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






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






5. When Charles Darwin was in the Galapagos islands - one of the first things he noticed is the variety of ___________ that existed on each of the islands.






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






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






8. 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.






9. _____________ 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.






10. Organisms struggle for existence. Organisms with advantageous characters survive - while those which lack such variations perish. The advantageous characters are passed on to the offsprings generation after generation and the organisms become better






11. Linnaeus placed all monkeys and apes along with humans into the order _________






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






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






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






15. 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.






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






17. __________ are the remains of organisms that lived in the past.






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






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






20. 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.






21. Biodiversity crashes during ________ extinctions. This has been a powerful force in evolution - wiping the slate clean of up to 96% of all species - and providing the survivors with a world full of opportunities into which they can diversify.






22. 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






23. 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.






24. Except for the tail fins - whales greatly resemble fish in outline - but are instead descended from four-legged land ___________.






25. 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.






26. Primates evolved about approximately 30 million years ago in ___________. One branch of primates evolved into the Old and New World Monkeys - the other into the hominoids (the line of descent common to both apes and man).






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






28. _____________ struggle takes place between the individuals of different species.






29. 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






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






31. 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.






32. The ____________ mammals occupy Australia - and differ from placental mammals because they bear their young inside a pouch (instead of a placenta).






33. _________ ______ 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






34. 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.






35. 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.






36. Heritable variations are called _____________ variations. Such variations arising from changes in DNA are passed on within families and to the offspring from the parents.






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






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






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






40. 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.






41. ___________ evolution is an evolutionary process in which organisms not closely related independently acquire some characteristic or characteristics in common.






42. 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.






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






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






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






46. 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).






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






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






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






50. Prior to the scientific discoveries of the past 200 years - _____________ from the Book Of Genesis described how living things came into being.







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