Characteristics of Life & Chemical Evolution
cellular organization, reproduction, metabolism, homeostasis
What are the first 4 Characteristics of Life?
Life exists throughout the Universe and is distributed by space dust, meteoroids, asteroids, comets, planetoids, or potentially by spacecraft in the form of unintended contamination by microorganisms
What is the Panspermia Theory?
eukaryotic cells evolved from a symbiotic association of prokaryotes
What is endosymbiosis hypothesis?
Consisted of molten magma, when it cooled oceans of liquid water formed
What was early life like?
Life ____ exist elsewhere
What is “can”?
the last four characteristics of life
What are heredity, response to stimuli, growth and development, adaptation through evolution?
Universe expanded from a very high-density and high-temperature state
What is the Big Bang Theory?
this type of cell arose as a result of a fusion of Archaean cells with bacteria
What is a eukaryotic cell?
An enormous cloud of dust and gas
What did earth begin as?
Allowed for the mixing of genetic material from different individuals
What is sexual reproduction?
prokaryotic cells came first then eukaryotic with a nucleus
What is the order of cell type?
Earth's early atmosphere (rich in methane, ammonia, water vapor, and hydrogen) was exposed to electric sparks (like lightning).
What is the Electric Spark Theory?
the part of today’s cell that is the descendant of the first engulfed cell
What is the mitochondria?
Early earth was unrecognizable from ____
What is modern life?
Mutations, genetic drift, and recombination
What is genetic diversification?
organic molecules form and spontaneously polymerize into macromolecules under ____ earth’s conditions
What is early?
RNA was a fundamental molecule due to its ability to store genetic information and catalyze chemical reactions
rich supply of chemicals/right conditions for chemical reactions to occur, formed complex organic molecules.
What are the RNA World and Deep Sea Thermal Vents Theories?
plant cells came many years before animal cells
What is the order of eukaryotic cells?
Oldest fossils of cells appeared _____
What is 3.5 billion years ago?
Evolutionary Arms Races, Genome Duplication, Endosymbiotic Events, Environmental Adaptation, Cell Differentiation, Multicellularity, Sexual Reproduction were ___
What is necessary for diversity to arise?
Protein and or RNA
What was the first molecule in the formation of life?
complex organic molecules could have formed on the surfaces of clay minerals on primordial Earth; clay was a catalyst and organized matter into biological structure
What are the Clay and Ice Theories?
a shared prokaryotic ancestor led to these three types of cells
What is archaebacteria, eubacteria, and eukaryotes?
Consisted of hydrogen and helium, no oxygen
What was Early Earth atmosphere like?
The planet that humans are looking to inhabit
What is Mars?