Bio 51
Terms
undefined, object
copy deck
- Two major kinds of cells
- Prokaryotic and Eukaryotic
- Prokaryotic and Eukaryotic cells can be distinguished by?
- their structural organization
- Prokaryotes can consist of what organims?
- microorganisms called bacteria as well as archea
- Eukaryotic cells
- are all other forms of life
- DNA combines with what to form what within what?
- DNA combines with protiens to form chromosomes to form within the nnucleus
- cytoplasm contains what?
- thick cytosol and various organelles
- in Prokaryotes the DNA
- is not seperated from the cytoplasm in a nucleus
- In prokaryotes there are
- no membrane enclosed organelles in the cytoplasm
- Almost all prokaryotes have
- tough external cell walls
- Continuity of life is based on
- heritable inofmration in the form of DNA
- the building blocks of the chains (double alpha helix)has?
- founr kinds og nucleotides which convey information by the specific order of these nucleotides
- Paleontology
- the study of fossils was largely developed by Georges Cuvier a French anatomist
- Cuvier recognized that extinction
- had been a common occurence in the history of life
- Instead of evolution Cuvier advocated
- catatrophism, that boundaries between strata were due to local flood or drought that destroyed the species then present. Later, this area would be repopulated be species immigrating from other unaffected areas.
- James Hutton proposed that the diversity of land forms could be explained by mechanims currently operating
- Hutton proposed a theory of gradualism
- Gradulism
- a view of the earths history that attributes profound change to the cumulative product of slow but continuous processes
- Charles Lyell proposed a theory of
- uniformitism
- uniformitism
- is that geological processes had not changed throughout Earth's history