Chapter 1 Flashcards
Characteristics of Life (6)
> Organized > Requires materials and energy > Ability to Reproduce and Develop > Responds to its environment > Maintains an internal environment > Has the capacity to adapt to its environment
Biological Organization (12)
atom molecule cell tissue organ organ system organism species population community ecosystem biosphere
Scientific Method (7)
Observation Hypothesis Prediction Experiment Analyze data Confirm hypothesis Conclusion
Correct way to write a hypothesis
by using deductive reasoning - “If, then”
EXAMPLE: If butterflies are attracted to sugar water, then more butterflies will move to the chamber w/sugar water.
Difference between hypothesis and theory
Hypothesis is an informed statement that can be tested, whereas a theory is a principle set to explain something already supported by data
adaptation
species modification in structure, function, or behavior that makes a species more suitable to its environment
energy
capacity to do work and bring about change; occurs in a variety of forms
evolution
genetic change in a species over time, resulting in the development of genetic and phenotypic differences that are the basis of natural selection; descent of organisms from a common ancestor
genes
unit of heredity existing as alleles on the chromosomes; in diploid organisms, typically two alleles are inherited - one from each parent
homeostasis
maintenance of normal internal conditions in a cell or an organism by means of self-regulating mechanisms
metabolism
the sum of the chemical reactions that occur in a cell
mutation
change in the nucleotide structure on and organisms DNA
Natural Selection
mechanism of evolutionary change caused by environmental selection of organisms most fit to reproduce; results in adaptation to the environment
