ANIMALIA

Question 2

example of porifera

Answer 2

sponges

Question 3

example of cnidaria

Answer 3

jellyfish, coral

Question 4

example of platyhelminthes

Answer 4

flatworms, tapeworms

Question 5

example of annelids

Answer 5

earthworms, leeches

Question 6

example of mollusca

Answer 6

snails, clams, octopi

Question 7

example of arthropods

Answer 7

crabs, insects, spiders

Question 8

example of echinoderms

Answer 8

sea stars, sea cucumbers

Question 9

example of chordates

Answer 9

humans, dogs,

Question 10

bilateral symmetry

Answer 10

Body is divided into two parts (mirror images); makes rapid movement possible; The sense organs are near the mouth.

Question 11

radial symmetry

Answer 11

Repeating sections with neither a head or tail; Sense organs are distributed in a circle (eg. starfish)

Question 12

what is a coelom

Answer 12

fluid filled cavity that acts as a hydrostatic skeleton and contains the internal organs

Question 13

why are coeloms important

Answer 13

• Enabled innovations + complexity in animals
• Separates digestive tract from the body wall
  ⤷ helps with movement of the body (it would be hard to move if our organs were attached to our outer body cells because any movements would distort any organ cells with possible implications to functioning)
• Creates space for organs and allows them to grow independently of the body wall
• Absorbs shock to protect organs and allow for complex movements without affecting organ systems
• Gives hydrostatic skeleton

Question 14

what is a hydrostatic skeleton

Answer 14

Hydrostatic pressure (water pressure) where the water is incompressible and acts as a skeleton to allow for movement in invertebrates

Question 15

diploblastic vs triploblastic

Answer 15

• Diploblastic - have two cell layers to their bodies; an outer Ectoderm and an inner Endoderm (between these two layers may be an amount of noncellular material)
• Triploblastic - have 3 cell layers in their bodies, Ectoderm (Outer layer) Mesoderm (middle layer) and Endoderm (inner layer)

Question 16

sessile

Answer 16

immoble/fixed on one place

Question 17

do sponges have embryonic layers

Answer 17

no

Question 18

sponge skeleton is made of….

Answer 18

spicules; interlock to make a calcium carbonate skeleton

Question 19

what is an amebocyte

Answer 19

Totipotent (ability to transform into any cell) amoeba-like cells that slither around using pseudopodia and are found in animals such as sponges, mollusks, and starfish

Question 20

sponges are ______ feeders

Answer 20

filters

Question 21

cnidaria layers

Answer 21

endoderm, mesoglea, ectoderm