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Chapter 2 Sci. Vocab
Holt Life Science Textbook Chapter 2 Vocabulary
Question | Answer |
---|---|
cell | the smallest functional and structural unit of all living organisms |
homeostasis | the maintenance of a constant internal state in a changing environment |
sexual reproduction | two parents produce offspring that share characteristics of both parents |
asexual reproduction | a single parent produces offspring that are identical to the parent |
metabolism | the sum of all chemical processes that occur in an organism |
producer | an organism that can make its own food by using energy from its surroundings |
consumer | an organism that eats other organisms or organic matter |
decomposer | an organism that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrients |
protein | a molecule that is made up of amino acids and that is needed to build and repair body structures and to regulate processes in the body |
carbohydrate | a class of molecules that includes sugars, starches, and fiber |
lipid | a fat molecule or a molecule that has similar properties |
phospholipid | a lipid that contains phosphorus and that is a structural component in cell membranes |
ATP | adenosine triphosphate, a molecule that acts as the main energy source for cell processes |
nucleic acid | a molecule made up of subunits called nucleotides |