Biology 240 Final Exam

Front 1

Nematoda

Back 1

Pseudocoel

Front 2

Cnidaria

Back 2

Tissues but no mesoderm

Front 3

Mollusca

Back 3

Shizocoel

Front 4

Echinoderms

Back 4

deuterstomes

Front 5

platyhelminthes

Back 5

mesoderm but blind gut

Front 6

arthropoda

Back 6

exoskeleton

Front 7

sponges

Back 7

no tissues

Front 8

homologous structures: insects and birds

Back 8

triploblastic germ layers

Front 9

homologous structures: insects and mollusks

Back 9

mouth from blastospore

Front 10

homologous structures: insets and centipedes

Back 10

one pair of antennae

Front 11

homologous structures: butterflies and bees

Back 11

wings from exoskeleton

Front 12

homologous structures: spiders and scorpions

Back 12

chelicerae: Chelicerae are pointed appendages which are used to grasp food, and are found in place of the chewing mandibles most other arthropods have

Front 13

homologous structures: crabs and shrimp

Back 13

two pairs of antennae

Front 14

What additional advantage does the exoskeleton of arthropods provide for locomotion?

Back 14

it allows for changes in body position by muscles acting across joints

Front 15

what body feature first allowed animals to move using muscles instead of cilia?

Back 15

hydrostatic skeleton

Front 16

which one of the following features also occurs (typically) in animals with a schizocoelous coelom?

Back 16

blastopore becomes mouth

Front 17

which occurs in diploblastic animals?

Back 17

radial symmetry

Front 18

humans have ________symmetry and _______ cleavage, with the blastpore becoming the _______. Since they have three tissue layers, they are called _____________.

Back 18

radial, indeterminate, anus, tiploblastic

Front 19

what term describes the evolutionary/developmental process by which the thorax and other specialized body regions arose in arthropods

Back 19

tagmosis

Front 20

of the three main groups of arthropods, which lacks mandibles?

Back 20

chelicerata

Front 21

what group of arthropods has two pairs of antennae?

Back 21

crustacea

Front 22

the ________pole of the embryo has the most yolk

Back 22

vegetal

Front 23

gastrualtion provides the blastula with _______and _________

Back 23

archenteron, coelom

Front 24

in an amniotic egg the ______stores waste allowing for a smaleer/larer size. The _________is for gas exchange.

Back 24

allantois, chorion

Front 25

T/F: in protostomes the anus evolves from the blastocoel

Back 25

false

Front 26

T/F: in pseudocoelomates the coelom develops from the blastocoel

Back 26

true

Front 27

T/F: torsion is a distinctive feature of bivalvia

Back 27

false

Front 28

T/F: during cleavage there is simultaneous mitosis with little growth

Back 28

true

Front 29

sponges (porifera)

Back 29

no tissues, no gut

ecological: filter feeders, habitat for other animals,
human: possible medicine, ecological

Front 30

Jellies (Ctenophora)

Back 30

radial symmetry, cilia used to propel forward, 2 long tentacles to capture prey,

new evidence shows they diverged before sponges

Front 31

Cnidarians

Back 31

true tissues, diploblastic, blind gut, radial symmetry, cnidocytes used to capture prey, intracellular and incomplete digestion,

Front 32

cnidarians: 4 types?!

Back 32

1. hydrozoa: Alternation of sexually-reproducing medusa stage with polyp stage that buds off medusae asexually

2.scyphozoa: jellyfish...main life stage is medusa, small polyp stage
3.cubozoa: box staged medusa stage
4. anthozoa: sea anemones...polyp stage only,
3.

Front 33

bilateria

Back 33

triploblastic, allows greater muscles provides greater activity

Front 34

platyhelminthes (flatworms)

Back 34

blind gut and no coelomic activity, triploblastic, respiration by diffusion

trematoda (fllukes)