Bio Lab 2 (Porifera and Cnidaria)

Question 1

Phyla being discussed

Answer 1

Porifera and cnidaria

Question 2

Porifera and cnidaria

Answer 2

very simple
eukaryotic
multicellular
ingestive- feeding heterotroughs

Question 3

porifera

Answer 3

• mostly salt water
• asymmetrical body plan
• filter feeding
• sessile
• have three body plans

Question 4

three body plans of …

Answer 4

porifera

asconoid
synconoid
leuconoid

Question 5

asconoid

Answer 5

• hollow cylinder

Question 6

synconoid

Answer 6

cylinder with alternating pockets

Question 7

leuconoid

Answer 7

extensive aquifers system

Question 8

Porifera body plan

Answer 8

• center cavity is called the spongocoel
• water current is formed by choanocytes (collar cells) that also filter water
• water enters through the osmium and exits through the sponge through osculum

Question 9

what creates water current

Answer 9

choanocytes, food-filtering cells that line the internal cavity

Question 10

Porifera sponge wall consists of

Answer 10

• amoebocytes have multiple names based on their function
• they make collagen fibres, make spicules, make gemmules and make sperm and eggs
• also have spongin, spicules, mesenchyme

Question 11

gemmules

Answer 11

asexual reproduction in Porifera made by amoebocytes

Question 12

spongin

Answer 12

proteinaceous fibers that give sponges their form

- Porifera

Question 13

spicules made of

Answer 13

• Porifera

- that are made of calcium (calcareous) or silicon (siliceous) 1

Question 14

mesenchyme

Answer 14

• porifera

- is a gelatinous matrix that the spongin and spicules are embedded in

Question 15

cnidaria

Answer 15

• radially symmetrical
• a body wall surrounds a cavity where extracellular digestion occurs
• carnivorous

Question 16

cnidaria digestion

Answer 16

extracellular

Question 17

cnidaria body wall is made of

Answer 17

ectoderm with an outer later or stinging cells called cnidocytes

• mesoglea: gelatinous middle
• endoderm, the inner cell layer called the gastroderm)

Question 18

cnidocytes

Answer 18

stinging cells that have a long harpoon-like structure called a nematocyst

• when triggered, it discharges the nematocyst
• cnidaria

Question 19

cnidaria body plans

Answer 19

polyp form is flower like and sessile

the medusa form is umbrella like and mobile

Question 20

hydrozoa = hydroid

Answer 20

• cnidaria
• polyp dominant
• asexual reproduction via budding and fragmentation
• sexual reproduction VIA FORMATION OF SPERMARIES OR OVARIES

Question 21

species obelia

Answer 21

hydrozoa

- have gastrozoids, gonozoids

Question 22

obelia fertilization

Answer 22

zygote that divides into a solid ball called a blastula. then this forms a free swimming planula
0 planula will eventually settle and form a new colony, away from its parental colony to avoid competition

Question 23

gastrozoids

Answer 23

specified feeding polyps that are in hydrozoa. the cup with the hair

Question 24

gonozoids

Answer 24

polyps that bud female and male reproductive medusa that release eggs and sperm, respectively, from gonads. the fat arm thing

Question 25

physalia

Answer 25

floating colonial hydroid with each hydroid performing a specific function

Question 26

gonionemus

Answer 26

hydroid with an unusually large medusa that has the characteristics of class scyphozoa

Question 27

class scyphozoa

Answer 27

• cnidaria. medusa dom
• has a mouth at the end of the manubrium, allowing food to pass into the gastrovascular cavity
• velum is muscle that helps propel it
• gonadal tissue is in the cavity for sex

Question 28

Scyphozoa stage

Answer 28

dominant is medusa where planula (larva) settles to form a polyp called a scyphistostoma that forms a medusa=budding polyp called the stabile
- stabile buds off the ephrya (immature medusa)

Question 29

immature medusa in scyphozoa

Answer 29

ephrya

Question 30

klarva in scyphozoa

Answer 30

planula

Question 31

polyp in scyphozoa

Answer 31

scyphistostoma

Question 32

Porifera comment name

Answer 32

sponges

Question 33

species grantia

Answer 33

looks like a plant

Question 34

choanocytes

Answer 34

ALSO CALLED collar cells draw water into the sponge by rotating flagella

Question 35

sponges have what kind of digestion?

Answer 35

intracellular

Question 36

sponge walls

Answer 36

contains choanocytes and amoebocytes, and spicules along with a jelly matrix called a mesenchyme

Question 37

what do spicules do

Answer 37

act as support and shape, keep the pores and osculum open

Question 38

grantia has how may spicule prongs?

Answer 38

3

Question 39

classes in cnidaria

Answer 39

Hydrozoa, Scyphozoa and anthozoa

Question 40

cnidaria body plan

Answer 40

poly and medusa. alternation is called polymorphism

Question 41

envision the life cycle of a cnidaria

Answer 41

medusa - makes gametes- fertilization - zygote- blastula- planula- polyp and then can do budding or can sexually bud mini medusae called ephyras

Question 42

how many budding medusae per gonozooid

Answer 42

2 medusa buds

Question 43

why are tentacles of gonionemus rough

Answer 43

nematocyst from the cnidocyte

Question 44

know the parts of the medusa

Answer 44

yes

Question 45

class anthozoa

Answer 45

largest class

- these are anemones and corals