32.3 protostome and deuterostome deveopment

Question 1

how do you determine whether it is protostome or deuterostome?

Answer 1

cleavage coelom formation fate of the blastopore

Question 2

what pattern of cleavage do protostomes do

Answer 2

spiral cleavage determinant cleavage

Question 3

*spiral cleavage

Answer 3

the planes of cell division are diagonal to the vertical axis of the embryo

Question 4

determinate cleavage

Answer 4

-protosomes -rigidly casts the developmental fate of each embryonic cell very early

Question 5

what pattern of cleavage do deuterostomes do?

Answer 5

radial cleavage interdeterminate cleavage

Question 6

*radial cleavage

Answer 6

cleavage please are parallel or perpendicular to the vertical axis

Question 7

interdeterminate cleavage

Answer 7

each cell produced by early cleavage division retains the capacity to develop into a complete embryo -if a sea urchin cells were isolated at the 4cell stage, Each would turn into a larva -stem cells -twins

Question 8

*gastrulation in protostomes

Answer 8

the archenteron (digestive tube) is formed from solid mesoderm splitting to form the column

Question 9

*gastrulation in deuterostomes

Answer 9

the archenteron is formed and then -mesoderm buds off of the wall of the archenteron to form the cavity

Question 10

the blastopore

Answer 10

the indentation that during gastrulation leads to the formation of the archenteron

Question 11

fate of the blastopore in protostomes

Answer 11

mouth becomes the first opening and the anus becomes a second opening

Question 12

fate of the blastopore in deuterostomes

Answer 12

anus becomes the first opening and the mouth becomes a second opening