Ch. 1 Word Search
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1. ____________________ the sum of all chemical processes that occur in an organism
2. ____________________ a testable idea or explanation that leads to scientific investigation
3. ____________________ the process by which individuals that are better adapted to their environment survive and
reproduce more successfully than less well adapted individuals do; a theory to explain the mechanism of
evolution
4. ____________________ the process of obtaining information by using the senses; the information obtained by
using the senses
5. ____________________ the process of producing offspring
6. ____________________ in an experiment, a group that serves as a standard of comparison with another group to
which the experimental group is identical except for one factor
7. ____________________ in an experiment, the factor that is deliberately manipulated
8. ____________________ a heritable change in the characteristics within a population from one generation to the
next; the development of new types of organisms from preexisting types of organisms over time
9. ____________________ a segment of DNA that is located in a chromosome and that codes for a specific
hereditary trait
10. ____________________ a tumor in which the cells begin dividing at an uncontrolled rate and become invasive
11. ____________________ a technique that places a gene into a cell to correct a hereditary disease or to improve the
genome
12. ____________________ the passing of genetic traits from parent to offspring
13. ____________________ a procedure that is carried out under controlled conditions to discover, demonstrate, or
test a fact, theory, or general truth
14. ____________________ a statement made in advance that expresses the results that will be obtained from testing
a hypothesis if the hypothesis is supported; the expected outcome if a hypothesis is accurate
15. ____________________ the maintenance of a constant internal state in a changing environment; a constant
internal state that is maintained in a changing environment by continually making adjustments to the internal and
external environment
16. ____________________ a change in the nucleotide-base sequence of a gene or DNA molecule
17. ____________________ the scientific study of living organisms and their interactions with the environment
18. ____________________ a system of ideas that explains many related observations and is supported by a large
body of evidence acquired through scientific investigation
19. ____________________ in biology, the smallest unit that can perform all life processes; cells are covered by a
membrane and contain DNA and cytoplasm
20. ____________________ the complete genetic material contained in an individual
21. ____________________ a fatal genetic disorder in which excessive amounts of mucus are secreted, blocking
intestinal and bronchial ducts and causing difficulty in breathing
22. ____________________ human immunodeficiency virus, the virus that causes AIDS
23. ____________________ a group of organisms that are closely related and can mate to produce fertile offspring;
also the level of classification below genus and above subspecies
24. ____________________ in an experiment, the factor that changes as a result of manipulation of one or more
other factors (the independent variables)
25. ____________________ the study of the interactions of living organisms with one another and with their
environment
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