biol 227 lecture Exam Study Questions with
Complete Answers
what is the structural protein that hold animals body together?
collagene
define two unique characteristics of animals body
nervous tissues, muscle tissues
*all animals reproduce sexually
F, most animals
which stage dominate animals life cycle?
diploid
after a sperm fertilizes the egg, the zygote undergoes rapid cell division called ?
cleavage
cleavage leads to formation of a multicellular hollow...
blastula
what happen to blastula
it undergoes to gastrulation forming a gastrula with different layer of embryonic tissue
say the different stage of cell development after zygote
zygote-> cleavage-> blastula (inside is called blastocoel-> gastrulation-> gastrula
what is different parts of gastrula?
blastocoel, endoderm, ectoderm, archenteron, blastopore
most animals have at least ........ stage
, one larval stage
* all animals have at least one larval stage
F, most
what is larva?
A larva is sexually immature and morphologically distinct from the adult; it eventually
undergoes metamorphosis to become a juvenile
a..... resemble an adult but it is not yet sexually mature
juvenile
what is choanoflagellates?
protists that are closest living relatives of animals
what are the evidence that choanoflagellates are the closely relatives to animals?
cell morphology
DNA sequence homology
what is radial symmetry?
no front and back or left andright
two sided symmetry is called......
bilateral symmetry
what bilateral symmetry?
dorsal is top, ventral is bottom, posterior is back, anterior is front
what is the name of the development of head?
cephalization
what is cephalization?
Complete Answers
what is the structural protein that hold animals body together?
collagene
define two unique characteristics of animals body
nervous tissues, muscle tissues
*all animals reproduce sexually
F, most animals
which stage dominate animals life cycle?
diploid
after a sperm fertilizes the egg, the zygote undergoes rapid cell division called ?
cleavage
cleavage leads to formation of a multicellular hollow...
blastula
what happen to blastula
it undergoes to gastrulation forming a gastrula with different layer of embryonic tissue
say the different stage of cell development after zygote
zygote-> cleavage-> blastula (inside is called blastocoel-> gastrulation-> gastrula
what is different parts of gastrula?
blastocoel, endoderm, ectoderm, archenteron, blastopore
most animals have at least ........ stage
, one larval stage
* all animals have at least one larval stage
F, most
what is larva?
A larva is sexually immature and morphologically distinct from the adult; it eventually
undergoes metamorphosis to become a juvenile
a..... resemble an adult but it is not yet sexually mature
juvenile
what is choanoflagellates?
protists that are closest living relatives of animals
what are the evidence that choanoflagellates are the closely relatives to animals?
cell morphology
DNA sequence homology
what is radial symmetry?
no front and back or left andright
two sided symmetry is called......
bilateral symmetry
what bilateral symmetry?
dorsal is top, ventral is bottom, posterior is back, anterior is front
what is the name of the development of head?
cephalization
what is cephalization?
