Midterm 1 Lecture 2

Question 1

what 3 things were studied to find the origin of vertebrates

Answer 1

fossil records, phylogenetics (shared characteristics from common ancestry), evolutioary developmental biology

Question 2

are basal vertebrates located near the end or origin of evolutionary tree

Answer 2

origin

Question 3

around what time period did vertebrates most likely first appear

Answer 3

cambrian explosion

Question 4

how did their feeding mechanism direct the evolution of chordates

Answer 4

jaws can snatch prey right from the water, muscular mechanisms used in moving feeding currents

Question 5

what is in the taxon craniata

Answer 5

everything with a skull

Question 6

what are the 5 major innovations of vertebrates

Answer 6

vertical column, head cranium and brain, jaw, limbs, cleidoic eggs/eggs with shells and liquid inside

Question 7

what allowed anterior expansion into the brain

Answer 7

heads with prominent sensory organs and cranium