Notifications

Zoology - Chapter 9 Quizam Review

0.0(0) Reviews
Duplicate
Report Flashcard set

Spaced Repetition

Scientifically backed study method

spaced repetition

Flashcards

Review terms and definitions

flashcards

Learn

Study with MC, T/F, and other questions

learn

Practice Test

Take a test on your terms and definitions

exam

Tags

35 Terms
😃 Not studied yet (35)
Colonial theory
the idea that multicellular life emerged from colonies of single cell organisms eventually developing to specialize.
Syncytial theory
the idea that multicellular life emerged from multinucleate cells developing partitions within themselves.
Pinacocytes
outer sponge cells
knowt flashcard image
Mesohyl
the middle layer of sponges
knowt flashcard image
mesenchyme
the cells in the mesohyl of a sponge
knowt flashcard image
choanocytes
flagellated collar cells on the inside of sponges used to generate currents and catch particles for food.
knowt flashcard image
spicule
the sturdy "skeleton" of sponges that help them keep their shape.
knowt flashcard image
porocytes
specialized pinacocytes that are mildly contractile to regulate water flow through the sponge
knowt flashcard image
amoeboid cells
a type of mesenchyme cells that travel around the sponge delivering waste and food to where it needs to be.
knowt flashcard image
ostia/ostium
the small openings on the sides of a sponge used to draw in water
osculum
the large opening at the top of the sponge, usually serves as an exit
knowt flashcard image
spongocoel
the area inside the sponge
knowt flashcard image
ascon
simplest, least common, smallest body plan
knowt flashcard image
sycon
middle body plan, more common
knowt flashcard image
leucon
most complex, most common, largest body plan
knowt flashcard image
incurrent canal
canals in a sponge used to draw water in from outside the sponge
knowt flashcard image
radial canal
canals inside a sycon sponge branching off the spongeocoel
knowt flashcard image
excurrent canal
canals leading out of the sponge (most common in luecon sponges)
knowt flashcard image
gemmules
packets of sponge pieces expelled by sponges in extreme conditions to reproduce asexually when conditions are better
monoecious
every individual has both sperm and eggs so only one individual is needed to sexually reproduce
Polyp
stationary cnidarian body form, usually radially symmetric with oral end facing up and tentacles used for feeding.
knowt flashcard image
medusa
free swimming cnidarian body form, radially symmetric, oral end facing down and tentacles for hunting
knowt flashcard image
mesoglea
gooey noncellular in between layer of cnidarians
nerve net
simplistic nervous system of cnidarians
gastrovascular cavity
the cavity that the mouth leads into and is used in digestion and waste expulsion
zooid
one specialized member of a colonial animal
epidermis
the outer layer of cells of cnidarians arisen from the ectodermis
gastrodermis
the inner layer of cells in cnidarians lining the gastrovascular cavity arisen from the endodermis
cnidocyte
the stinging cell in cnidarians
nematocysts
specialized cnidocytes in the tentacles of some cnidarians with that eject a barbed and/or venomous thread to attack prey
knowt flashcard image
dioecious
each individual carries either eggs or sperm so two individuals are needed for sexual reproduction
planula
the free floating larva of cnidarians
knowt flashcard image
gastrozooid
member of a colonial animal specialized for digestion
gonozooid
member of a colonial animal specialized for reproduction
When did multicelluar life arise?
600 millions years ago