Deck 2 Flashcards
all other animals are these and they have distinct tissues
eumetazoa
which has symmetry? parazoa or eumetazoa
eumetazoa
the plane that bisects an animal with bilateral symmetry into two halves
mid-sagittal plan
two advantages of symmetry:
cephalization and greater mobility
how many germ layers produced by eumetazoa
three
body coverings and nervous system germ layer
ectoderm
skeleton and muscles germ layer
mesoderm
digestive organs and intestines
endoderm
space in between tissues, surrounded by mesoderm
coelom
body cavity between mesoderm and endoderm
pseudocoelomates
body cavity entirely within the mesoderm
coelomates
zygote dvides to form a blank
blastula
holllow ball of cells
blastula
this becomes an opening to the digestive system
blastopore
type of cleavange in protostomes and the cells move as they divide
spiral
type of cleavage in deuterostomes and cells stay in position as they divide
radial
determinate development becuase if you remove one cell, development ceases
protostomes
indeterminate development because embryonic cells can develop a new individual
deuterostomes
coelom forms simply and directly from splitting the mesoderm in
protostomes
coelom forms indirectly from outpocketing of the archenteron in
deuterostomes
blank evolved from blank about how many mya
deuterostomes….protostomes…500 mya
two advantages of segmentation
allows redundant organ systems, and allows for more efficient and flexible movement
lack symmetry and tissues
parazoa
have symmetry and tissues
eumetazoa
have two germ layers
diploblastic
have three germ layers
triploblastic
how are triploblastic animals divided today?
genetics
the animal kingdom is
monophyletic
two theories of where protists came from
multinucleate hypothesis, colonial flagellate hypothesis
which theory of where protists came from is supported by molecular systematics today
colonial flagellate hypothesis
enormous expansion of animal diversity in the Cambrian period
cambrian explosion
how did the cambrian explosion occur
the Hox developmental gene complex evolved
Fungi spores are always blank, no matter what
Haploid
Collemchyma, parenchyma, and sclerenchyma are all blank tissue
Ground
Leaves do not have blank
Pericycle
Phloem consists of blank
Sieve tube members
Blank causes seed germination
Gibberellic acid
What regulates direction of cell expansion in plants?
Direction of cellulose reinforcement
Phloem has cells separated by blank
Sieve plates
Root pressure can result in blank
Guttation
Root pressure is independent or dependent on transpiration
Independent
These promote lateral bud growth in branches
Cytokinins
Plants tolerate supercooling by increasing blank in blank
Saturated lipids in plasma membranes
Parazoans first separated from blank
Eumetazoans
larval sponges are different from adult sponges because they are
free-swimming
the inner layer of porifera contains blank
choanocytes which are also called collar cells
central layer of porifera which are gelatinous and are called blank
mesohyl
sponges digestion is known as blank
intracellular
type of digestion where each cell eats on its own
intracellular
where waste exits from the spong
osculum
Asexual reproduction of a sponge is called blank
fragmentation
larval sponges are produced by blank reproduction and use blank for swimming
sexual, cilia
have radial symmetry and two germ layers… examples are cnidaria and ctenophora
diploblasts
The layers of a diploblast are called
epidermis, gastrodermis, and in between is the mesoglea
the mesoglea is blank
noncellular
mostly all marine, have tissues but not organs, and are exclusively carnivorous
cnidaria
the largest organic structure in the world
great coral reef
these can reproduce by budding and either sexually or asexually
polyp
these cnidarians can only reproduce sexually
medusa
what kind of digestion do cnidarians have
extracellular
what kind of digestion do humans have
extracellular
blank have no circulatory, respiratory, or excretory systems
cnidaria
specialized stinging cells are blank
nematocytes
special type of nematocyte organelle that has a harpoon coated in poison
nematocyst
how many classes of cnidarians
5
small phylum whose members are called comb jellies
ctenophora
ctenophora propel themselves with eight rows of blank and have no blank
cilia, stinging cells
how do ctenophora capture prey?
colloblast
who’s more complex, ctenophora or cnidaria?
ctenophora
blank are bilaterally symmetrical and are all triploblastic
bilateria
animals that have three tissue layers
triploblastic
what is in the inner endoderm
gut lining
what is in the outer ectoderm
skin and nervous tissue
what is in the middle mesoderm
muscle and bone
two major clades of protostomes
spiralians and ecdysozoans
clade of protostomes that grow by adding mass to an existing body and have spiral cleavage
spiralians
clade of protostomes that increase in size by molting their external skeletons
ecdysozoans
soft body animals that are protostome and acoelomates and have developed musculature
planarians