BIOL140 Lecture 2: Bio 140- Lectures Two and Three

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21 Jun 2016
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BIO Lecture #2
September 15th, 2015
How do we know if something is living?
Biology- the study of life (living systems)
7 Characteristics of Living Things:
Structures and functions are organized
Levels are connected and interact
Life is organized
1.
Habitable regions- all areas on earth where organisms can survive
Biotic- Living
Abiotic- Non-living
Needed to fuel chemical reactions
Ex. Plants can photosynthesize
Some organisms absorb energy
Ex. Humans eating Pizza
Some Organisms consume molecules
Energy
a.
Molecules are needed to build cells, structures, and whole
organisms
Molecules are used for growth, repair and functions
Ex. Meat (Protein) Amino Acids Insulin (Protein)
Molecules are consumed, broken down and rebuilt into needed
structures
Building Blocks
b.
Organisms Require Resources from Environment
2.
Reproduction- Making more of the same species
Ex. Yeast (single Celled)
Strawberry Plant; Hydra (Multicellular)
Exact copy is made
Asexual Reproduction
a.
Male +Female =Offspring
Sperm +Oocyte (Egg) =Zygote
Fusion of Chromosomes from two parents
Sexual Reproduction
b.
Reproduction
3.
Ex. Cell grows from half size to full size
Increase in size or cell numbers
Growth
a.
Growth and Development
4.
Ex. Human Baby grows by adding more cells
Ex. Bacteria Colony growth by adding more individuals
Stages
Immature to Mature
Development
b.
BIO Lecture #3
September 17th, 2015
Lectures Two and Three
September 11, 2015
12:17 PM
BIO 140 Page 1
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