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Bio ch 26

QuestionAnswer
What is phylogeny? Evolutionary history of a species/group
What is systematics? Classification of organisms based on evolutionary relationships
What do phylogenetic trees show? Evolutionary relationships and common ancestry
Do trees show “more evolved” organisms? No—just relationships, not superiority or complexity
What is a clade? groups of organisms that includes a common Ancestor + all of its descendants
Homologous structures? Same ancestry, different function
Analogous structures? Same function, different ancestry (convergent evolution)
How can DNA show relatedness? Fewer differences = closer relationship
What are shared derived characters (synapomorphies)? Traits unique to a clade
Difference between ancestral vs derived traits? Ancestral = older, shared broadly Derived = newer, define clades
What are the 3 domains? Which are most closely related? Bacteria, Archaea, Eukarya Archaea + Eukarya are most closely related
why can RNA preform many functions single stranded so it folds into complex 3D shapes and can act like an enzyme
ribozymes rna molecules that act as enzymes and catalyze reactions
why is the ribosome considered a ribozyme the rRNA (not the protein) catalyzes peptide bond formation
what's the RNA world hypothesis early life used RNA for both genetic material infor and catalysis
what formed early membranes fatty acids
what structures do fatty acids form vesicles
why is compartmentalization important keeps molecules together which increases reaction efficiency
how could protocells evolve variation and natural replication which made them have better survival and replication
Created by: Lilyhowes
 

 



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