HSA Biology Public Release 2005 - mdk12

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Session 2 ■50 Reef-building coral are marine animals with single-celled algae living in their tissues. The coral provide protection for the algae and the algae provides food for the coral. Which of these statements best explains what would happen to the coral if the algae die? F G H J The coral would grow well because it does not have a competitor. The coral would die because it needs the food produced by the algae. The coral would grow well because it does not have a parasite. The coral would die because it cannot produce food for the algae. (2)MDB01138 D irections Use the information and food chain below to answer Numbers 51 and 52. A summer camp was built near a lake in the mountains. The campers used the lake for swimming, fishing, and boating. The relationships between three organisms found in the lake are shown below. LAKE FOOD CHAIN Algae Striped Fish Spotted Fish ■51 Which of these fish cell structures would be most directly affected by a change in the oxygen level of the lake? ■52 Striped fish are affected by biotic and abiotic factors in their environment. Which of these factors is biotic? A mitochondrion F water temperature B chloroplast G mineral nutrients C golgi apparatus H freshwater algae D endoplasmic reticulum J inorganic sediments Biology Public Release 2005 Page 34 Copyright © 2005 by Maryland State Department of Education.
Session 2 ■53 A researcher recently discovered a species of bacteria. DNA sequences were obtained from it and from several other species of bacteria. The DNA sequences came from the same part of the bacterial chromosome of each species. DNA Sequence Unknown Species ACT GCA GCC Species I ACA GCG CCG Species II ACT GCT GGC Species III ACA GCC GGG Species IV ACT GCA GCG According to the data above, the unknown bacteria are most closely related to which species? A B C D Species I Species II Species III Species IV Biology Public Release 2005 Page 35 Copyright © 2005 by Maryland State Department of Education.
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Page 3 and 4: Session 1 Sample A Which of these i
Page 5 and 6: Session 1 ■3 The table below show
Page 7 and 8: Session 1 D irections Use the infor
Page 9 and 10: Session 1 ■9 The energy required
Page 11 and 12: Session 1 ■10 According to the pa
Page 15 and 16: Session 1 17 BCR Scientists are stu
Page 17 and 18: Session 1 ■21 Which of these orga
Page 21 and 22: Session 1 ■27 Hemoglobin is an im
Page 23 and 24: Session 2 Biology Public Release 20
Page 25 and 26: Session 2 ■33 Cells in the stomac
Page 27 and 28: Session 2 ■34 Hydrothermal vent c
Page 29 and 30: Session 2 38 BCR Galactosemia is an
Page 31 and 32: Session 2 ■41 Which of these is p
Page 33 and 34: Session 2 ■42 Coyotes and gray wo
Page 35: Session 2 48 BCR Mammals are expose

HSA Biology Public Release 2005 - mdk12

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