chaper 1 Flashcards
(22 cards)
biology
the scientific study of life
evolution
the process of change that has transformed life on earth
emergent properties
result from the arrangement and interaction of parts within a system
levels of biological organization
biosphere ecosystem communities population organisms organs &organ systems tissue cells organellas atoms molecules
system biology
constructs models for the dynamic behavior of whole biological systems
major processes of ecosystems
- cycling of nutrients
- flow of energy from sunlight to producers to consumers
relationship of structure and function
closely related, a leaf is thin and flat to maximize the capture of light
cell
lowest level of organization that can preform all activities required for life
eukaryotic
larger, has membrane around organelles
prokaryotic
simple, smaller, no organelles
chromosomes
contain most of a cells genetic material in the form of DNA
genes
unit of inheritance
negative feedback
the more a product accumulates the more it slows: hunger
positive feedback
the more a product accumulated the more it speeds: labor
taxonomy
branch of biology that names and classifies species into groups
branches of taxonomy
domain kingdom phylum class order family genus species
3 domains of life
bacteria
archaea
eukara
darwin’s 2 main points
- species showed evidence of decent with modification from common ancestors
- natural selection is mechanism behind “decent with modification”
data
recorded observations or items of information
qualitative
descriptions rather than measurements
quantitative
recorded measurements, sometimes tables and graphs
theory vs hypothesis
theory- supported by a large body of evidence
hypothesis- a tentative answer to a well framed question, leads to predictions that can be tested
