Across
- 1. ___ are weak acids or bases.
- 2. The organelle that stores the cell's DNA.
- 8. A pH of 0 is ___.
- 9. An organelle that stores materials like water, salts, proteins, and sugars.
- 10. ___ succession often follows events such as wildfires, hurricanes, or other natural disturbances.
- 12. All living things obtain and use materials and ___.
- 13. An organism's genetic makeup.
- 14. ___ and oxygen are outputs of cellular respiration.
- 19. A water molecule is made of two __ atoms and one oxygen.
- 20. ___ cells contain nuclei.
- 24. ___ factors are the nonliving components of an ecosystem.
- 25. The organelle that changes, sorts, and packages proteins and other materials for "shipment".
- 31. An organism that can make its own food is called a/an __.
- 32. A tightly coiled structure made of DNA and proteins (shaped like an "X").
- 34. Having just one set of chromosomes.
- 37. The study of biological inheritance.
- 38. Have a pH value above 7.
- 40. The act of maintaining constant internal conditions.
- 44. A ___ ___ is used to predict the possible offspring of a cross.
- 45. The movement of water across a semipermeable membrane.
- 50. Having two complete sets of chromosomes.
- 51. ____ occurs when two or more species that depend on each other change together over time.
- 52. Sugars and starches are this type of macromolecule.
- 54. ___ evolution occurs when two or more species become more and more alike.
- 55. The decoding of an mRNA message into a protein occurs during ___.
- 58. ___ succession begins in an area that has no existing community (bare rock; there is no soil or plant life).
- 59. All living things are based on a universal ___ ___.
- 61. __ ___ is the two-name naming system used to identify living organisms.
- 64. ___ occurs when the phenotype for both alleles show up at the same time.
- 65. Term referring to water.
- 69. An organism that cannot make its own food is called a/an ___.
- 72. The __ variable is plotted on the X-axis.
- 74. ___ and water are inputs of photosynthesis.
- 75. Biology is the study of ___.
- 79. All living things are made of ___.
- 80. ___ data is descriptive data (it can not be measured or assigned a number).
- 82. Term referring to land.
- 84. ___ evolution occurs when two or more species become more and more dissimilar.
- 88. An ecological relationship in which one organism benefits and the other is neither helped nor harmed.
- 91. A group of organisms that resemble one another and can interbreed and produce fertile offspring.
- 92. Organelle that carries out photosynthesis.
- 93. An organism's ecological "job" - where and how it makes a living.
- 94. A relationship in which one organism lives in or on another, at the expense of that organism.
- 95. ___ individuals have two identical alleles for a given trait.
- 97. Species change over time.
- 98. Organelle that makes proteins.
- 99. In a DNA molecule, ___ always pairs with thymine.
Down
- 1. The cell membrane is made of a lipid ___.
- 3. An organelle that contains enzymes to break down cell substances.
- 4. Uncontrolled cell growth results in ___.
- 5. A biome characterized by little rainfall or precipitation and sometimes extreme daily temperature changes.
- 6. All living things ___ and develop.
- 7. ___ are factors that control an individual's traits and are passed down from parent to offspring.
- 10. A series of predictable changes that occur in a community over time.
- 11. Any relationship in which two species live closely together.
- 15. A __ is a scientific explanation for a set of observations that can be tested.
- 16. The organelles that convert food into energy.
- 17. ___ data can be measured or assigned a number to.
- 18. The place where an organism lives.
- 21. ____ ____ are the building blocks of proteins.
- 22. A ___ is a well-tested explanation that accounts for a lot of observations and hypotheses.
- 23. A substance formed by two or more elements.
- 26. ___ occurs when there is a blending of traits.
- 27. ____ forests are characterized by evergreens and other trees that do not lose their leaves.
- 28. An attraction between molecules of the same substance (for example, water molecules to other water molecules).
- 29. ___ are different forms of the same gene (such as blue eyes or brown eyes).
- 30. ___ cells lack nuclei.
- 33. Have a pH value below 7.
- 35. The movement of particles from an area of high concentration to an area of low concentration.
- 36. Cohesion and adhesion contribute to the property of water that allows some insects to walk on water.
- 39. ___ is the energy "currency" of all living things.
- 41. Scientific studies begin with __, the act of noticing and describing what is happening in an orderly way.
- 42. This biome is characterized by permafrost, a layer of permanently frozen subsoil.
- 43. Another word for autotroph.
- 46. The organism that a parasite lives in or on is called the ___.
- 47. Another word for heterotroph.
- 48. ___ __ is also known as "survival of the fittest".
- 49. The ___ ___ regulates what enters and leaves a cell.
- 53. ___ factors are the living components of an ecosystem.
- 56. ___ is the process in which somatic (body) cells are created.
- 57. The process in which DNA is copied.
- 60. Nucleus, mitochondria, and chloroplasts are examples of ___.
- 62. Carbohydrates, lipids, proteins, and nucleic acids are the 4 types of __.
- 63. A system of membranes within a cell. There are two types: smooth and rough.
- 66. An organism's physical appearance.
- 67. During ___, RNA molecules are produced that are complementary to the DNA sequences in genes.
- 68. The ___ variable is plotted on the Y-axis.
- 70. ___ individuals have two different alleles for a given trait.
- 71. All living things ___, or create offspring.
- 73. DNA and RNA are ___ ___.
- 74. A ___ shows evolutionary relationships between species.
- 75. Fats and oils are this type of macromolecule.
- 76. The fluid portion of a cell outside of the nucleus.
- 77. An interaction in which two species benefit.
- 78. The tropical ___ ___ has more species than all of the other biomes combined.
- 81. An interaction in which one animal captures and feeds on another animal.
- 83. All living things ___ to their environment.
- 85. Sperm and egg are reproductive cells, or ___.
- 86. ___ is the process in which gametes are made.
- 87. An attraction between molecules of different substances.
- 89. ___ are biological catalysts; they speed up chemical reactions.
- 90. A change in genetic information that can be inherited.
- 96. A controlled experiment is an experiment in which only __ variable is changed.