Chapter 1 Flashcards
What are 2 ways of studying living things?
Discovering biology
Experimental biology
What’s involved in the scientific method?
Observations Ask questions Propose explanation and hypothesis Experiment Use a control: varies in 1 aspect Report
If a hypothesis is tested many times and is irrefutable it is a ____?
theory
What are laws?
something consistently observed, mathematically defined, but incompletely explained
What two theories define biological sciences?
Cell Theory
Theory of Evolution
What is the Cell Theory
All living things are composed of cells
All cells must come from pre-exsisting like cells
When were cells discovered?
17th century
What did Robert Hooke do?
cellulae
more modern microscopes
Who discovered animalcules?
Antwon Leewenhoek
Where do cells come from?
pre-exsisting cells (Pasteur proved this)
spontaneous generation
What is the Theory of Evolution?
Descent from common ancestor with modifications
Darwin - observations (occurs by nature)
What is Natural Selection?
Environment chooses individuals within a population
Adaptions - heritable traits that increase fitness
Artificial selection - through producing things w/ specific traits
Why is evolutions a core theme?
It ties together unity(DNA, amino acid) and diversity(1.7 million living species)
How is live different?
Biodiversity
What is taxonomy?
a classification grouping system developed by Linnaeu
List all the taxons.
Domain Kingdom Phylon Class Order Family Genus Species
What are Eukaryotes?
cells with a nucleus
single or multicelled (humans)
What are Prokaryotes?
no nucleus/ membranous organelles
single cells
How are living things alike?
Live exhibits order Tendency to evolve Organisms require energy and nutrients Organisms sense and respond to change Organisms use DNA
What is the Reductionist approach?
organize life’s components into levels
understand small and continue to big
What is chemical ecology?
all sciences come together; big picture
