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RELEASED EOCT QUESTIONS

RELEASED EOCT QUESTIONS . 55. Members of which of the following phyla have the MOST species which are parasites of humans? A Porifera B Mollusca C Echinodermata D Platyhelminthes. 55. 66 Members of which of the following phyla have the MOST species which are parasites of humans?

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RELEASED EOCT QUESTIONS

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  1. RELEASED EOCT QUESTIONS

  2. 55 • Members of which of the following phyla • have the MOST species which are • parasites of humans? • A Porifera • B Mollusca • C Echinodermata • D Platyhelminthes

  3. 55 • 66 Members of which of the following phyla • have the MOST species which are • parasites of humans? • D Platyhelminthes • FLATWORMS! • Half of known species are parasites

  4. 44 • The genetic disorder trisomy 21 (Down • syndrome) is caused by what genetic • event? • A crossing-over • B nondisjunction • C base pair substitution • D frame-shift location

  5. trisomy 21 (Downsyndrome) • Caused by having 3 copies of chromosome 21 for a • total of 47 chromosomes • Symptoms • Growth delays • Characteristic facial features • Intellectual disability (never pass mental capacity of 8-year-old child)

  6. 44 • The genetic disorder trisomy 21 (Down • syndrome) is caused by what genetic • event? • B nondisjunction • When chromosomes fail to separate normally, resulting in too many or too few chromosomes

  7. 46 • Which of these can help farmers • counteract the negative effects on their • soil? • A contour planting • B insect predators • C large-scale irrigation • D expensive fertilizers

  8. 46 • Which of these can help farmers • counteract the negative effects on their • soil? • A contour planting • Planting across a slope along elevation contour lines • This slows down water flow during heavy rain, reducing erosion

  9. Farming caused this….

  10. 65 • Algae are commonly found in both fresh • and saltwater. Under certain conditions, • they may undergo population explosions. • When this happens with one particular • type of algae, it causes a red tide. Because • of the toxins produced and released by • these single-celled algae, many fishes are • killed. Which of the following organisms • is responsible for red tides? • A zooplankton • B dinoflagellates • C green algae • D brown algae

  11. Red Tide • Algal bloom caused by dinoflagellates (protists)

  12. 65 • Which of the following organisms • is responsible for red tides? • B dinoflagellates

  13. 18 • 18 Which of the following “organisms” is • considered to be an exception to the cell • theory? • A bacteria • B viruses • C amoeba • D yeast

  14. 18 • 18 Which of the following “organisms” is • considered to be an exception to the cell • theory? • B viruses • Viruses are not “cells,” cannot reproduce without a host, and do not use energy • They challenge our definition of life

  15. 20 • A researcher could BEST monitor a • person’s rate of respiration by measuring • which of the following characteristics? • A oxygen consumption • B body temperature • C heart rate • D lung capacity

  16. 20 • A researcher could BEST monitor a • person’s rate of respiration by measuring • which of the following characteristics? • A oxygen consumption

  17. 26 • In glycolysis, the first stage of cellular • respiration, ATP molecules are produced. • What is the net gain of ATP molecules • (per molecule of glucose) from glycolysis? • A 1 • B 2 • C 4 • D 36

  18. 26 • In glycolysis, the first stage of cellular • respiration, ATP molecules are produced. • What is the net gain of ATP molecules • (per molecule of glucose) from glycolysis? • B 2

  19. 38 • The process by which the order of bases • in messenger RNA (mRNA) codes for the • order of amino acids in a protein is called • A translation • B transcription • C replication • D nondisjunction

  20. 38 • The process by which the order of bases • in messenger RNA (mRNA) codes for the • order of amino acids in a protein is called • A translation

  21. 62 • A.I. Oparin and J.B.S. Haldane each • suggested that Earth’s oceans once • contained large amounts of organic • molecules that eventually gave rise to precells. • What is Oparin and Haldane’s idea • historically known as? • A big bang theory • B cell theory • C primordial soup model • D evolutionary model

  22. 62 • What is Oparin and Haldane’s idea • historically known as? • C primordial soup model • Early Earth’s atmosphere, exposed to energy in various forms (lightning), produced simple organic compounds ("monomers"). • These compounds accumulated in a "soup", which may have been concentrated at various locations (shorelines, oceanic vents etc.). • By further transformation, more complex organic polymers – and ultimately life – developed in the soup.

  23. 13 • 13 Which of the following examples • illustrates osmosis? • A Water leaves the tubules of the kidney in • response to the hypertonic fluid • surrounding the tubules. • B Digestive enzymes are excreted into the • small intestine. • C White blood cells consume pathogens • and cell debris at the site of an infection. • D Calcium is pumped inside a muscle cell • after the muscle completes its • contraction.

  24. 13 • 13 Which of the following examples • illustrates osmosis? • A Water leaves the tubules of the kidney in • response to the hypertonic fluid • surrounding the tubules.

  25. 25 • 29 Which protist causes malaria? • A amoeba • B euglena • C paramecium • D plasmodium

  26. 25 • 29 Which protist causes malaria? • D plasmodium

  27. 27 • 31 If placed in a hypertonic solution, a plant • cell will • A swell • B burst • C shrink in size • D remain constant in size

  28. 27 • 31 If placed in a hypertonic solution, a plant • cell will • C shrink in size

  29. 54 • 65 Humans have had a tremendous impact • on the environment. What has caused an • increase in the amount of acid rain? • A use of chlorofluorocarbons • B use of pesticides • C coal burning power plants • D nuclear power plants

  30. 54 • 65 Humans have had a tremendous impact • on the environment. What has caused an • increase in the amount of acid rain? • C coal burning power plants

  31. 45 • 54 Pea plants have seeds that are either • round or wrinkled. In this cross, what will • be the phenotypic ratio of the offspring? • RRxRr • R= round, r=wrinkled • A 50% RR and 50% Rr • B 25% RR, 50% Rr, and 25% rr • C 50% round seeds and 50% wrinkled • seeds • D 100% round seeds

  32. 45 • 54 Pea plants have seeds that are either • round or wrinkled. In this cross, what will • be the phenotypic ratio of the offspring? • RRxRr • R= round, r=wrinkled • D 100% round seeds

  33. 58 • Water (H2O) is an example of a molecule • whose atoms are held together by which • of the following? • A covalent bonds • B ionic bonds • C metallic bonds • D hydrogen bonds

  34. 58 • Water (H2O) is an example of a molecule • whose atoms are held together by which • of the following? • A covalent bonds

  35. 60 • Which shows secondary succession?

  36. 60 • Which shows secondary succession? • Regrowth of life in an area that was partially destroyed • By fire, human activity, tsunami, etc. • Primary succession is regrowth in an area where NO life existed

  37. 64 • Which of the following is an example of • micro-evolution in organisms? • A speciation • B bio-magnification • C habitat selection • D pesticide resistance

  38. Microevolution • Changes of alleles over time in a population • Ex: • Blue eyes becoming more common in humans

  39. 64 • Which of the following is an example of • micro-evolution in organisms? • D pesticide resistance

  40. 3 • Which of the following is the smallest unit • as shown on the metric ruler below? • A centimeter • B kilometer • C millimeter • D hectometer

  41. 3 • Which of the following is the smallest unit • as shown on the metric ruler below? • C millimeter

  42. 53 • Homeostasis is the maintenance of stable • conditions within the body. Which of the • following is a method of maintaining • homeostasis in the human body? • A working in air conditioning • B shivering when cold • C eating balanced meals • D sleeping regularly

  43. 53 • Homeostasis is the maintenance of stable • conditions within the body. Which of the • following is a method of maintaining • homeostasis in the human body? • B shivering when cold

  44. 56 • 67 The gene for red/green colorblindness in • humans is recessive and primarily affects • males. It must be located on • A the X chromosome • B the Y chromosome • C both the X and Y chromosomes • D either the X or Y chromosome

  45. 56 • 67 The gene for red/green colorblindness in • humans is recessive and primarily affects • males. It must be located on • A the X chromosome

  46. 71 • The biome populated by cone-bearing • trees such as pine, spruce, and fir is the • A deciduous forest • B coniferous forest • C savanna • D tundra

  47. 71 • The biome populated by cone-bearing • trees such as pine, spruce, and fir is the • B coniferous forest

  48. 11 • 11 Which of the following correctly lists the • phases of the cell cycle starting with the • interphase? • C

  49. 33 • As represented in the diagram below, • bacteria have cell walls like plant cells do. • Unlike the plant cell walls, however, the • bacterial cell wall is made of which of the • following? • A cellulose and starches • B chitin and fats • C sugars and amino acids • D cellulose and sugars

  50. 33 • Bacteria have cell walls like plant cells do. • Unlike the plant cell walls, however, the • bacterial cell wall is made of which of the • following? • C sugars and amino acids

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