The Study of Life Organism living thing containing
organs(organelles in some cases) Biology the science of life
Slide 3
Themes of Biology Cell structure and function Stability and
Homeostasis Reproduction and inheritance Evolution Interdependence
of organisms Matter, energy, and organization
Slide 4
Cell Structure and Function Unicellular organisms organisms
with only 1 cell Multicellular organisms organisms composed of more
than 1 cell Differentiation becoming different as multiplication
occurs and specializing.
Slide 5
Stability and Homeostasis Homeostasis stable level of internal
conditions. Found in all living things stability is actions that
drive toward homeostasis. Example: thirst/drinking water
Slide 6
Reproduction and Inheritance Reproduction all organisms produce
new organisms like themselves. Hereditary information is passed on
from parent to offspring. Large molecule = DNA(deoxyribonucleic
acid) Cytocine, adenine, thymine, guanine A with T, C with G
Slide 7
Reproduction and Inheritance, cont. Gene short segment of DNA
that contains the instructions for the development of a single
trait of an organism. ***(new notes) Sexual reproduction hereditary
information is combined 1 of 2 ways. 1. 2 parts from a single
organism (flower) 2. 1 part from two organisms of the same
species.
Slide 8
Reproduction and Inheritance, cont.2 Asexual reproduction
hereditary information from different organisms isnt combined.
Example : bacterium splitting in 2. Contains identical copies of
itself = clone.
Slide 9
Evolution Change over generations Explains how organisms alive
today are related to those that lived in the past Provides a basis
for exploring relationships among different groups of living
organisms. Natural selection most important driving force in
evolution. Organisms that have certain favorable traits are better
able to successfully reproduce than organisms that lack these
traits.
Slide 10
Interdependence of Organisms Ecology interaction of organisms
with one another and with their environment. Example : populations
of predators/prey Ecosystems = environmental communities.
Slide 11
Matter, Energy, and Organization Photosynthesis changing energy
from the sun into energy plants can use Autotrophs make their own
food. Heterotrophs must take in food to meet energy needs.