cell biology Flashcards
Biology
the study of life
all organisms consist of
cells
subatomic particles
protons, neutrons, electrons
atoms
smallest part of an element
molecule
combination of atoms
organelle
structures within a cell that compartmentalize chemical reactions
cell
smallest unit of life
tissue
two or more cells working together
organ
two or more tissues working together
organ system
two or more organs working together
organism
individual living thing
population
members of one species living together
speciests
interbreeding organisms
community
populations of more than one species living in the same area
ecosystem
community and non living enviroment
bisophere
living and non living things on Earth
Sense and Respond
ex: plants growing towards the light
Growth and Devlopment
grow: becomes bigger over time
development: changes over the lifespan of organism
directed by DNA, influenced by enviroment
Reproduce
Parents transmit DNA to offspring
Can be reproduced from single cell or entire organism
DNA is copied as part of reproduction
Energy processing
Acquire and use energy and materials
Homeostasis
Maintain relatively constant internal envrioment
Evolutionary Adaptation
evolving to adapt to their enviroment
Evolution
Wallace and Darwin
all living organisms descend, with modifications, from pre-existing life forms
Mechanism for creating new species
Individual variations: Genetic variations (mutations)
Natural Selection
