LS1- Chapter 1

LS1- Chapter 1 - Chapter 1- Studying Life Cell- interacting...

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Chapter 1- Studying Life Cell- interacting systems of molecules enclosed in compartments Cell theory- Cells are the basic structural and physiological units of all living organisms. Cells are both distinct entities and building blocks of more complex organisms. Unicellular- a single cell carries out all functions of life Multicellular- made of many cells that are specialized for different functions Evolution- the change in the genetic composition of a population of organisms over time. Through differential survival and reproduction, living systems evolve and become adapted to the Earth’s many environments. Natural selection- the phenomenon in which any trait that confers even a small increase in the probability that its possessor will survive and reproduce would be strongly favored and would spread in the population Mutations- a detectable, heritable change in the genetic material not caused by recombination Internal environment- must remain within a given range of physical and chemical conditions in order for an organism to remain healthy Species- a group of organisms that look alike and can breed successfully with one another Adaptations- a particular structure, physiological process or behavior that makes an organism better able to survive The evolutionary process that leads to the development of such a trait. DNA- (deoxyribonucleic acid) the information that is passed from parent to daughter cells Molecules that are long sequences of 4 different repeating subunits (nucleotides). Nucleotides- repeating subunits of genetic material Genes- a specific segment of a DNA molecule that contains information for making proteins Proteins- one of the most fundamental building substances of living things Long chain polymer
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LS1- Chapter 1 - Chapter 1- Studying Life Cell- interacting...

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