Lab 8

Question 1

diploblastic

Answer 1

having 2 tissue layers endoderm and ectoderm

Question 2

triploblastic

Answer 2

having 3 tissue layers: endoderm, mesoderm, ectoderm

Question 3

which animal does not have true tissue therefore not diploblastic or triploblastic?

Answer 3

sponges

Question 4

asymmetry

Answer 4

no central axis which divides the body into mirror image halves. Ex: when crabs have dominant claw

Question 5

radial symmetry

Answer 5

multiple axes through a central point that divide the body into mirror image halves. Ex- Sea urchin

Question 6

bilateral symmetry

Answer 6

a single axis which divides the body into mirror image halves. Ex- Cat

Question 7

what kind od cleavage is asscioated with an animal that can produce zygote clones

Answer 7

radial/ indeterminate cleavage

Question 8

in animal life history gametes are produced by “blank” and are the only “blank” animal cells

Answer 8

meiosis; haploid

Question 9

what type of cleavage is a characteristic of many lophotrochozoan animals (molluscs or annelids)

Answer 9

spiral determinate cleavage

Question 10

what type of cleavage is a characteristic of ecdysozoan animals ( arthropods or nematodes)

Answer 10

idiosyncratic determinate cleavage

Question 11

what kind of digestive tract where the mouth and anus are the same opening

Answer 11

Blind/closed gut

Question 12

what kind of digestive tract includes where the mouth and anus are separate openings

Answer 12

open gut

Question 13

how can you tell for an open gut?

Answer 13

look at the gastrula to see if the blastopore became a mouth or anus

Question 14

animals that have a mouth derived from the blastopore

Answer 14

protostomes

Question 15

animals that have an anus derived from the blastopore

Answer 15

deuterostomes