Kingdom Animalia Introduction & Worms QUIZ

2/3/23

What domain, kingdom, and phylum are we currently studying?

Eukarya, animalia, platyhelminthes

bilateral symmetry

can be divided by a plane through their center in one place to form mirror images

radial symmetry

can be divided by a plane in several places to form mirror images

asymmetry

no symmetry

endoderm

inner layer, forms the digestive system

mesoderm

middle layer, forms the muscle, circulatory, excretory, and respiratory systems

ectoderm

outer layer, includes the nervous system and skin (outer coverings)

gastrulation

stage in embryonic development when blastula develops into gastula

cephalization

concentration of sensory and nerve cells at one end of the organism.  

hermaphroditism

sexually reproducing

coelem

body cavity

acoelomate

animal lacking a formal body cavity

regeneration

a form of asexual reproduction

phylum for roundworms

nematoda

phylum for flatworms

platyhelminthes

phylum for segmented worms

annelida

all worms exhibit _____ symmetry

bilateral

associated with the planarian’s nervous system

ganglia

asexual reproduction can occur through the process of _____

transverse fission

a hermaphrodite is an animal that:

has both male and female parts

how does the dugesia obtain oxygen?

diffusion