Bio Lab Excersize 1-3

Question 1

Synapomorphy

Answer 1

Shared derived characteristic or trait

Question 2

Parsimony

Answer 2

Simplest explanation or the fewest evolutionary changes

Question 3

Polyphyletic

Answer 3

Common descendent NOT common ancestor

Question 4

Paraphyletic

Answer 4

Common ancestor but not all common descendants

Question 5

Monophyletic

Answer 5

Includes a common ancestor and all of its descendants

Question 6

Clade

Answer 6

Group of organisms with a shared common ancestor

Question 7

Symmetry: Asymmetrical

Answer 7

No apparent symmetry

Question 8

Symmetry: radically symmetrical

Answer 8

The arrangement of parts around a central axis

Question 9

Symmetry: bilaterally symmetrical

Answer 9

Right and left half’s are symmetrical

Question 10

Protostome

Answer 10

Formation of the organisms mouth before anus
Exp: mollusca, annelida, Arthropoda, platyhelminthes

Question 11

Deuterostomem

Answer 11

Anus formed before mouth ,
Exp: chordata, and sea star group

Question 12

Acoelomate

Answer 12

Animals lack a body cavity, internal parts are connected by solid tissue

Question 13

Pseudocoelomate

Answer 13

Animals have a cavity between the gut and muscle

Question 14

Coelomate

Answer 14

Animals have a cavity within the mesoderm layer

Question 15

Homologous traits

Answer 15

Share a common ancestor

Question 16

Analogous traits

Answer 16

Result from a convergent evolution