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24 Cards in this Set
- Front
- Back
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The smallest unit that can perform all life processes is called a _________.
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Cell
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All living things are composed of one or more _________.
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cells
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Anything in the environment that causes a reaction or change in an organism is called a __________.
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Stimulus
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What covers a cell?
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A membrane
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What does a cell contain?
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A cell contains all the materials necessary for life.
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Describe how the contents of a cell are protected from the cell's environment.
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The membrane that surrounds a cell separates the contents of the cell from the cells environment.
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In an organism containing many cells, how is the work of the cell performed?
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In an organism with many cells, different kinds of cells perform specialized functions.
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What is a stimulus?
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A stimulus is anything in the environment that causes a reaction or change in an organism.
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When an organism's outside environment changes, through what process does the organism maintain a stable internal state?
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Homeostasis
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Why must an organism maintain stable internal conditions?
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Organisms must maintain stable internal conditions in order to survive.
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What is your body trying to do when you are either shivering or sweating?
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Your body is trying to return to normal by shivering or sweating.
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How do animals control their body temperatures?
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Animals control their body temperatures by moving from one environment to another.
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Two parents produce offspring that share their characteristics through __________ reproduction.
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sexual
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A single parent produces offspring identical to the parent through ____________ reproduction.
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asexual
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Most ______________ organisms reproduce through asexual reproduction.
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single-celled
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Most animals and plants reproduce through ________ reproduction.
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sexual
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What controls the structure and fuction of cells?
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DNA
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What do organisms pass on to their offspring?
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Organisms pass copies of their DNA to their offspring.
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What is heredity?
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Heredity is the passing of traits from parents to offspring.
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Name three examples of activities of life carried out by all organisms.
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1. Making food
2. Breaking down food 3. Moving materials in and out of cells and building cells |
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The total of all chemical activities that an organism performs is an organism's ______________.
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metabolism
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How does a single-celled organism grow?
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The cell gets longer and divides, making other oganisms.
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How do organisms with many cells grow?
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The number of cells gets larger, and the organism gets bigger.
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In addition to getting larger, what other things might happen as living things grow?
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They might develop and change as they grow.
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