Biology 1 Chapter 1 (Lecture) Flashcards
Emergent
Properties that are not present in the preceding level of biological organization, but are now present.
Biology
Scientific study of life.
Reductionism
Reducing complex systems to simpler components that are more manageable to study
Levels of Biological Organization (smallest to largest)
1) Atoms
2) Molecules
3) Organelles
4) Cells
5) Tissues
6) Organs
7) Organ Systems
8) Organisms
9) Population
10) Community
11) Ecosystem
12) Biosphere
Atoms
Smallest chemical units
Molecule
Chemical structure consisting of 2 or more atoms
Organelles
Various functional components that make up cells. These are made up of molecules. (EX: Chloroplasts)
Cells
Fundamental unit of structure and function. It might take more than 700 cells to reach across a penny.
Tissues
Cells organized into groups because they have similar functions.
Organs
Tissues grouped together and organized.
Organ Systems
Organized organs
Organisms
Individual living things (includes plants, animals, bacteria, etc.)
Population
Consists of all the individuals of a species living within a certain area.
Community
Combination of different populations that are in a particular area.
Ecosystem
Combination of the nonliving things in an area with the communities
Biosphere
All the earth’s ecosystems combined.
Organisms interact with
Their environment, exchanging matter and energy
Structure and Function
Correlated at all levels
Cells are an organism’s
Basic unit of structure and function.
Every cell is enclosed by
A membrane that regulates things in and out of cells.
All cells have
cytoplasm
DNA
A cell’s genetic info. (deoxyribonucleic acid)
central database
2 main forms of cells
Prokaryotic and Eukaryotic
Prokaryotic
Smaller No nuclear membrane (No nucleus) No membrane bound organelles Kinds: Bacteria & Archea Does have ribosomes
Eukaryotic
Larger Has a nuclear membrane (has a nucleus) Has membrane bound organelles Kinds: Plants, animals, fungi, & protist Does have ribosomes
Genes
the units of inheritance that transmit information from parents to offspring
Two long chains of DNA are arranged in
a Double Helix
Each chain link of DNA has one of four kinds of
Chemical building blocks (A, G, C, & T)
Genome
The entire “library” of genetic instructions that an organism inherits.
Mechanisms that regulate biological systems
Feedback (Positive & Negative)
3 Domains (Broadest units of classifications) of Life
1) Archaea (prokaryotic)
2) Bacteria (prokaryotic)
3) Eukarya (Eukaryotic)
Kingdoms (of Eukarya)
1) Protista
2) Plantae
3) Fungi
4) Anamalia
Hypothesis
Tentative answer to a well-framed question – an explanation on trial
Theory
Much broader in scope than a hypothesis
Writing Genus and species
Genus specie
EX: Streptococcus pygenes, Homo sapiens
Darn King Phillip Came Over From Germany Saturday
Domain Kingdom Phylum Class Order Family Genus Species