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CLEP Biology

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. Internally generated patterns of body functions - including hormonal signals - sleep - blood pressure - and temperature regulation - which have approximately a 24-hour cycle and occur even in the absence of normal cues about whether it is day or nigh






2. Develops from the morula as a thin layer of cells surrounding an internal cavity.






3. The solid mass of cells resulting from the cleavage of the ovum before the formation of a blastula.






4. Is secreted by the adrenal cortex to promote sodium reabsorption in the kidney.






5. Contain organisms that are multicellular eukaryotes including vertebrates and invertebrates.






6. Anabolism






7. Mitochondria - they constitute the center of cellular respiration.

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8. Proposes that those individuals within a population that are most adapted to the environment are also the most likely individuals to produce viable offspring.






9. Are organic cofactors or coenzymes that are required by some enzymatic reactions.






10. Some enzymes contain a __________ component that is essential to their functions.






11. In both living and non-living environments.






12. Veins in the leaf and are also distributed throughout the stem






13. Studied the relationships between traits expressed in parents and offspring and the genes that caused the traits to be expressed.






14. Is a special protein that acts as a catalyst for organic reactions.






15. The most recent and present era. It includes the radiation of flowering plants - the angiosperms.






16. Is an accidental change of the DNA sequence of the gene that can result in creating a change of trait that is not found in the parent.






17. Where protein synthesis occurs. They float unattached in the cytoplasm. They contain RNA that is specific to their function in protein formation.






18. Is the earliest period of the Paleozoic era. Began with the Cambrian explosion - this explosion of life resulted in the representatives of most of the modern phyla being present.






19. Niche






20. A cell will only remain stable if the surface area of the plasma membrane maintains a __________ with the volume of the cytoplasm.






21. Is the control of protein synthesis. Genetic traits are expressed and specialization of cells occur as a result of the combination of proteins produced by the DNA of a cell.






22. Secretes insulin to lower blood sugar and maintain equilibrium. A person eats three candy bars. Within minutes this endocrine gland affects blood-glucose homeostasis.






23. The transfer of electrons.






24. Contains the chromosomes and is the site of reproduction through mitosis and meiosis.






25. The pharynx is between the nasal passage and the trachea. Air passes into the body via the nasal passage - then passes through the pharynx and on to the trachea.






26. A hydrogen bond involves the ________________ and can be easily broken.






27. Produce antibodies into the bloodstream that find and attach themselves to foreign antigens (toxins - bacteria).






28. Contains optic lobes - controls sight.






29. Stood upright before there was an increase in brain size.






30. Super-class of vertebrae including organisms with no jaws.






31. Contains many genes and is a structure comprised of linear DNA and associated proteins.






32. Covalent bonds






33. Can be accounted for by the theory of punctuated equilibrium. The fossil record shows periods of stability with regard to appearance and disappearance of species as well as periods of sudden change.






34. Is the outermost of the three main layers of an embryo.






35. A reaction that adds water to another compound. (2 hydrogens - 1 oxygen).






36. Is weaker than ionic - covalent - disulfide - or double bonds.






37. The size of a cell is limited by the ratio of its surface area to volume.






38. A sex-linked recessive disorder carried on the x chromosome in which an individual cannot perceive certain colors.






39. Are where the sugars synthesized by photosynthesis travel through to various parts of the plant.






40. An enzyme is unaffected by the reactions it catalyzes






41. Some patrol the blood for antigens - but are also equipped to destroy antigens. They may regulate immune responses as well.






42. Is a phylum that contains jellyfish - hydra - etc.






43. The individual we recognize as an adult fern.






44. Is the major component of sand and is the most abundant element found in the lithosphere. It is not recycled.






45. Provide rigidity to plant cells (and some bacteria) and are not found within animal cells.






46. Bacteria break ammonia into nitrites - then into nitrates that are usable by plants; volcanic activity produces ammonia and nitrates that enter the soil and can be absorbed by plants; lightning reacts with atmospheric nitrogen to form nitrates that a






47. Becomes available for erosion as undersea sedimentary rocks are up-thrust by volcanic activity - erosion releases it from rocks into streams where it combines with oxygen to form phosphates in lakes that are then absorbed by plants - it is recycled t






48. There was extensive radiation of fish during the Devonian and Silurian periods within the Paleozoic Era.






49. The class composed of birds.






50. Chlorophyll pigments absorb photons of light - leaving the chlorophyll in a higher energy (excited) state - these then supply energy to reactions that produce ATP from ADP and Pi.