Lecture 2: The Diversity of Life Flashcards
1.Outline the characteristics that define life 2.Outline the scale of life 3.Outline the requirements of natural selection in shaping life 4.Outline the tree of life how we know what it looks like and key features including endosymbiosis 5.Outline what a phylogenetic tree represents 6.List the three domains of life
List the 8 characteristics of life.
Cellular Organization Reproduction Metabolism Homeostasis Heredity Response to Stimuli Growth and Development Adaptation though Evolution
Name the three domains of life.
Eukarya, Archaea and Bacteria.
What is similar between bacteria and archaea?
Both consist of prokaryotic cells.
How do Eukarya differ from the other two domains of life?
They are eukaryotes rather than prokaryotes.
What four groups make up eukarya?
Plantae, Animalia, Protists and Fungi.
What is the size difference between eukaryotes and prokaryotes?
Eukaryotes are often bigger than prokaryotes. Eukaryotes range from 10-100 µm and Prokaryotes from <5 µm.
How big are mitochondria?
1-10 µm
How big are chloroplasts?
2-5 µm
How big are ribosomes?
25 nm
What do you require for evolution?
Variation, Inheritance, Selection, Time.
What is the theory of endosymbiosis?
The theory that eukaryotic cells developed from prokaryotic cells.
What does a phylogenetic tree represent?
A phylogeny, or evolutionary tree, represents the evolutionary relationships among a set of organisms or groups of organisms.
