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The History of the CellThe Properties of LifeThe History of the CellThe Properties of Life
Biology Department
Hampton High School
SOL BIO 2a
Biology Department
Hampton High School
SOL BIO 2a
1665 Robert Hooke builds a microscope Discovers cells while looking at cork The invention of the microscope helped in
the discovery of chromosomes.
1675 Anton van
Leeuwenhoek saw protists in pond water
1772
Joseph Priestly demonstrates that oxygen is produced by plants
1839
Theodor Schwann shows that all animal tissue is made of cells
1839
Matthias Schleiden identifies cell parts in plants:
Membrane nucleus
1855 Rudolf Virchow states
that any cell came from a preexisting cell
Reproduction is the process by which living things make more of their own kind.
Mitosis and Meiosis - processes to make more body cells and sex cells
Cell Theory
All living things are made up of one or more cells
Cells are the basic units of structure and function in organisms
All cells arise from existing cells
2 Types of Cells
Eukaryote
(can be both unicellular and multicellular)
Prokaryote
(unicellular)
Eukaryotes 4 kingdoms that contain
eukaryotes are Protista, Fungi, Plantae, Animalia
Cells with: Nucleus
Organelles Enclosed DNA
Larger cell
Prokaryotes
Cells with no nucleus
Unicellular
No organelles
Free DNA
Bacteria cell
Monera Kingdom: Archaebacteria & Eubacteria
(Autotrophs and heterotrophs)
All Living Things
1.Monera Kingdom: Archaebacteria
2.Monera Kingdom: Eubacteria
3.Protista Kingdom
4.Fungi Kingdom
5.Plantae Kingdom
6.Animalia Kingdom
Characteristics of All Living Things
1.Made of cells
2.Maintain homeostasis – stable internal conditions
3.Metabolism – need energy (Autotrophs and/or heterotrophs)
4.Responsiveness
5.Reproduction
6.Contain heredity material – DNA/RNA
7.Growth/Development
1. All Living things are made of CELLS
1. All Living things are made of CELLS
There are 2 categories:
UNICELLULAR
AND
MULTICELLULAR
There are 2 categories:
UNICELLULAR
AND
MULTICELLULAR
Single Cell - unicellular
Organism has to perform all functions of life within one cell
Some have Chloroplasts - autotrophs (make own food)
photosynthesis
Multicellular
Cells are organized into an hierarchy: cells, tissues, organs, organ systems, organisms
Heterotrophs - obtain food by eating other things
Autotrophs like plants (trees, grass, flowers) – make their own food from the sun
Mitochondria organelle- used for respiration/power
Hierarchy of Life
Hierarchy:
First Step: Building blocks of living things are organized into a hierachy: Atom- molecule – macromolecule- organelle
Second step: Cells are organized into an hierarchy: cells, tissues, organs, organ systems, organisms
2. Living things fight for survival
Homeostasis - maintain internal standards (temp., water, salinity)
Stable internal conditions
3. Living things need ENERGY
Metabolism - chemical reactions that convert food into energy
Most energy comes from the sun that is later used by other organisms
Autotrophs vs. Heterotrophs
4. Living things RESPOND to their environment
Responsiveness organisms respond to their external environment
Ex. Flowers bend toward sunlight
5. Living things REPRODUCE
REPRODUCTION Organisms making more of themselves
Sexual and Asexual
Mitosis and Meisosis is cell reproduction
6. All living things have genetic material
6. All living things have genetic material
Heredity - When an organism reproduces, it passes its own traits to its offspring (children)
DNA and RNA hang out in the nucleus of eukaryote cells or free floating in prokaryote cells (bacteria)
Heredity - When an organism reproduces, it passes its own traits to its offspring (children)
DNA and RNA hang out in the nucleus of eukaryote cells or free floating in prokaryote cells (bacteria)
7. Growth/Development7. Growth/Development Growth – All
living things grow, either briefly or for thousands of years (i.e bacteria vs. a giant sequoia tree)
Development – organisms change as they grow; frogs develop from eggs to tadpoles to frogs
Growth – All living things grow, either briefly or for thousands of years (i.e bacteria vs. a giant sequoia tree)
Development – organisms change as they grow; frogs develop from eggs to tadpoles to frogs