M1 L1 diversity of life Flashcards
• Outline the characteristics that define life. • Outline the scale of life. • Outline the requirements of natural selection in shaping life. • Outline the tree of life, how we know what it looks like and key features including endosymbiosis. • Outline what a phylogenetic tree represents. • List the three domains of life.
chracteristics of life
cellular organization (how the cell is organized) reproduction metabolism homeostasis heredity Response to stimuli Growth and development Adaptation through evolution
sizes of cells and organell
Animal and plants 10-100 um
bacteria cells 1-5um
organells
- mitochondria 1-10um
- chloroplast 2-5um
prats of cell
- lipids 1-5um
- protein 5-10um
what is Natural Selection?
The process through which populations of living organisms adapt and change.
Requirements for natural selection.
Variation - individuals in a population varies from one another
inheritance - parents pass on their traits to their offspring
selection - some variation reproduce more then others
time - successful generation accumilate over many generations.
Parakaryote
- made of cells that lack nucleus and any membrane-bound organelles.
eukaryote
- made of cells that contain membrance bound organells and nucleus.
3 main domains
Bacteria
archea
Eukarya
Prokaryotes (name domains)
Bacteria
archea
Eukaryotes (name domain)
Eukaryotes (4 kingdoms)
- plantae
- fungi
- animalia
- protista
Endosymbiot theory
states that the mitochondria and chloroplast in eukaryotic cells were once aerobic bacteria (prokaryote) that were ingested by a large anaerobic bacteria (prokaryote)
which bacteria were mitochondria and cloroplast derived from?
proteobacteria - mitochondria
cyanobacteria - chloroplasts