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Definition
| a method of estimating the age of a rock sample in years |
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| a process that allows molecules to move across the cell membrane from lower to higher concentrations |
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| an inherited trait that helps an organism survive |
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| produce epinephrine, a hormone that prepares the body for stress |
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Definition
| bacteria that use oxygen for cellular respiration |
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| photosynthetic protists that are plant-like in many ways |
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| different forms of a gene |
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Definition
| tiny, sac-like structures of the lungs that are surrounded by capillaries where gas exchange takes place |
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Definition
| an egg that is surrounded by a shell to prevent it from drying out |
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| a group of protozoans that move byt means of pseudopods |
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Definition
| bacteria that do not require oxygen to survive |
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| an organism from which others have descended |
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| vascular, seed-producing plants whose seeds are enclosed in a fruit |
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| proteins that bind to viruses and prevent them from infecting cells |
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Definition
| the bones of the limbs, including the bones of the pectoral and pelvic girdles |
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| a measurements of how much surface something has |
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| blood vessels that carry blood away from the heart |
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| a type of reproduction that requires only one parent |
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| organisms that do not have symmetry |
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| the smallest particle of an element that keeps the chemical identity of that element |
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Definition
| a molecule that stores and transfers energy within the cells |
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Definition
| forms the axis of the body and includes the skull, vertebral column, ribs, and sternum |
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