SFSU BIO 240 EXAM 3 EXAM WITH
CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
triploblast - ANSWERS-3 germ layers
tunicates - ANSWERS-marine invertebrate of a group that
includes the sea squirts and scalps, rubbery or hard outer
coat and two siphons to draw water into and out of the
body
vertebrates - ANSWERS-animal w/ possession of a backbone
or spinal column
visceral mass - ANSWERS-organs
, archosauria - ANSWERS-dinosaurs, crocodiles, birds.
monophyletic group with similar bone morphology.
crocodilians - basal archosaurs. dinosaurs- evidence of
prenatal care/endothermy evolved in dinosaurs (one of
these lineages became birds)
aves - ANSWERS-birds- extant dinosaurs. birds/reptiles
shared characters = jaw bone structure (5 fused bones),
scales, egg structure (same membranes and structures
including egg tooth). toothless, hollow-boned, bipedal,
streamlined, feathered, endothermic, vertebrate w/ fast
metabolism.
bilateria - ANSWERS-triploblasts. animals with bilateral
symmetry. head/tail (cephalization). separate mouth/anus.
true coelom.
bivalves - ANSWERS-clams, oysters, mussels, scallops. shell
with 2 halves. mantle cavity contains gills used for feeding
and gas exchange. no radula. most are suspension feeders,
some have tentacles and eyes.
blastopore - ANSWERS-the opening of the central cavity of
an embryo in the early stage of development.
CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
triploblast - ANSWERS-3 germ layers
tunicates - ANSWERS-marine invertebrate of a group that
includes the sea squirts and scalps, rubbery or hard outer
coat and two siphons to draw water into and out of the
body
vertebrates - ANSWERS-animal w/ possession of a backbone
or spinal column
visceral mass - ANSWERS-organs
, archosauria - ANSWERS-dinosaurs, crocodiles, birds.
monophyletic group with similar bone morphology.
crocodilians - basal archosaurs. dinosaurs- evidence of
prenatal care/endothermy evolved in dinosaurs (one of
these lineages became birds)
aves - ANSWERS-birds- extant dinosaurs. birds/reptiles
shared characters = jaw bone structure (5 fused bones),
scales, egg structure (same membranes and structures
including egg tooth). toothless, hollow-boned, bipedal,
streamlined, feathered, endothermic, vertebrate w/ fast
metabolism.
bilateria - ANSWERS-triploblasts. animals with bilateral
symmetry. head/tail (cephalization). separate mouth/anus.
true coelom.
bivalves - ANSWERS-clams, oysters, mussels, scallops. shell
with 2 halves. mantle cavity contains gills used for feeding
and gas exchange. no radula. most are suspension feeders,
some have tentacles and eyes.
blastopore - ANSWERS-the opening of the central cavity of
an embryo in the early stage of development.
