1. Why don’t we learn these… Useful terms from Science Unit A? No reason not to.

2. Basic unit of structure and function of all living things?

3. cell

4. Thin covering that encloses a cell and keeps its parts together?

5. cell membrane

6. Organelle that controls all of a cell’s activities?

7. nucleus (of a cell)

8. Jellylike substance containing chemicals that help keep a cell functioning?

9. cytoplasm

10. Process by which many materials move in and out of cells?

11. diffusion

12. Diffusion of water and dissolved materials through a cell membrane?

13. osmosis

14. Cells that work together to perform a specific function?

15. tissue

16. Tissues that work together to perform a specific function?

17. organ

18. Organs that work together to perform a function?

19. system

20. Smallest blood vessels?

21. capillaries

22. Tiny air sacs, located at both ends of the lungs, through which gases are exchanged with the blood?

23. alveoli

24. Tiny tubes sticking into the small intestine that absorb nutrients into the blood?

25. villi

26. Tubes inside the kidneys where urea and water diffuse from the blood?

27. nephrons

28. Connective tissue that produces red and white blood cells?

29. bone marrow

30. Places where bones meet and are attached to each other and to muscles?

31. joints

32. Tough bands of connective tissue that attach muscles to bones?

33. tendons

34. Bands of connective tissue that hold a skeleton together?

35. ligaments

36. Specialized cell that can receive information and transmit it to other cells?

37. neuron

38. Nerve cells that detect conditions in the body’s environment?

39. receptors

40. Grouping of things by using a set of rules?

41. classification

42. Largest group into which living things are classified?

43. kingdom

44. Kingdom of organisms found with petroleum?

45. moneran

46. Kingdom of organisms that have only one cell and a nucleus?

47. protist

48. Living things such as mushrooms that look like plants, but cannot make their own food?

49. fungi

50. Second smallest grouping used in classification?

51. genus

52. Smallest grouping used in classification?

53. species

54. Animal with a backbone?

55. vertebrates

56. Animal that has hair and produces milk for its young?

57. mammals

58. Animal that has dry, scaly skin?

59. reptiles

60. Animal with moist skin and no scales?

61. amphibians

62. Vertebrate that lives in water?

63. fish

64. Vertebrate with feathers?

65. birds

66. Animal without a backbone?

67. invertebrates

68. Plant that has tubes for transporting food and water?

69. vascular plants

70. Plant that does not have tubes for transporting food and water?

71. nonvascular plants

72. Tubes that transport water and minerals in vascular plants?

73. xylem

74. Tubes that transport food in vascular plants?

75. phloem

76. Pigment, or coloring matter, that helps plants use light energy to produce sugars?

77. chlorophyll

78. Cycle in which nitrogen gas is changed into forms of nitrogen that plants can use?

79. nitrogen cycle

80. Process by which carbon and oxygen cycle among plants, animals and the physical environment?

81. carbon dioxide-oxygen cycle

82. Single reproductive cell that grows into a new plant?

83. spore

84. Plant with unprotected seeds; conifers or cone-bearing plants?

85. gymnosperm

86. Flower structures that contain the male reproductive cells?

87. pollen

88. A flowering plant?

89. angiosperm

90. Seeds of certain plants that are used for food?

91. grain

92. Any material that can be separated into threads?

93. fiber

94. Outer layer of cells of a leaf?

95. epidermis

96. Layer of cells in a leaf where most photosynthesis occurs?

97. palisade layer

98. Process by which cells release energy from food in order to carry on life processes?

99. cellular respiration

100. Plant’s response to a stimulus?

101. tropism

102. Plant’s response to gravity?

103. gravitropism

104. Joining of a male reproductive cell with a female reproductive cell?

105. fertilization

106. Male parts of a flower?

107. stamen

108. Female part of a flower?

109. pistil

110. Process by which plants make food?

111. photosynthesis

112. Plant’s response to light?

113. phototropism

114. Form of asexual reproduction in plants; reproduction without seeds?

115. vegetative propagation

116. Part of a flower that contains eggs?

117. ovary

118. Tiny plant inside a seed?

119. embryo

120. Structures where food is stored in seeds?

121. cotyledons

122. To sprout?

123. germinate

124. Plant stage when a germinated seed begins growing and making its own food?

125. seeding

126. Form of artificial reproduction that can produce desirable characteristics in woody plants?

127. grafting

128. Process of growing plants artificially in laboratories?

129. tissue culture

130. Only 25 more words to go!