biology 1406 chapter 1
Terms
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- 7 properties of life
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1. order
2. evolution
3. response
4. regulation of enviroment
5. energy process
6. growth and development
7. reproduction - Hierarchy of structural levels in biological organization
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1. biosphere
2. ecosystem
3. community
4. population
5. organism
6. organ
7. tissue
8. cells
9. molecules - biosphere
- all enviroment on earth inhabited by life
- ecosystem
- living & non- living components.
- community
- all species in a defined area
- population
- all individual of a single species in an area.
- organism
- individual life forms.
- organ and organ systems
- assist the organism to function and live.
- tissue
- a group of similarcells working togetherfor a particular function.
- cells
- fundemental unit of structure and function of life.
- organells
- fuctional component making up cells.
- molecules
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2 or more atoms bound together.
1. DNA
a. makes up part of chromosomes/ genes
b. double helix consisting of 4 different nucleotides
c. codes for protien builders which are structure and tools of cells. - prokarotic cells vs. eukaryotic cells
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prokaryotic= regulatory membrane, no nucleus, DNA, nucloid region, smaller
eukaryotic cells= regulatory membrane, organells, membrane enclosed, nucleus contains DNA, larger - Emergent properties
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I. "the whole is greater than sum of its parts"
A. specific arrangement and interaction of matter
1. enables life properties not found otherwise - delemma of reduction
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I. studing componets of complex systems
A. to understand the complexity of the system
B. disrupt emergent properties - regulatory machenisms: Positive feed back and Negative feed back
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-Negative feed back
a. most common form of regulation
b. accumulation of an end product slows down the process responsible for generation of the product.
c. ATP, insulin
-Positive feed back
a. less common form of regulation
b. end product speed up the its production
c. platlet attraction, pregnancy contractions - 4 classifiction of life
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I. diversity w/ in a non- species grouping
II. diversity across taxa
III. 3 domains of life
a.bacteria prokarotic cells
unicellular (most).
b.archela love salt,
prokaryotic cells,
unicellular
c.eukarya cells have a
membrane have membrane
bound organells, some are
unicellular, multicellular
kingdoms w/ different
modes of nutrition.
fungi= decomosers
plantae= photosynthesizers
animalia= ingest others
IV.Unity in the Diversity of Life