WorksheetsChapter 9 (Part IV)
Total questions: 10
Worksheet time: 5mins
______ implants itself into the lining of the uterus.
blastula
gastrula
blastocyst
morula
Repeated cell divisions of the zygote during the earliest embryonic development is known as:___________.
fertilization
cleavage
oogenesis
spermatogensis
What is the next event after cleavage during embryonic development?
infolding of the blastula leading to gastrulation
cells migrating to the outside to form a hollow ball of cells - the blastula.
maternal/cytoplasmic determinants differentiating cells
axis induction by the sperm entry point.
The middle layer of the blastocyst is the
endoderm
ectoderm
mesoderm
deuterostome
The ectoderm is on the outside of the developing embryo.
True
False
The mesoderm forms the
Bones and muscles
Urinary bladder
Skin
Glands
The embryo layer that forms the skin and nervous tissue is the _____.
endoderm
mesoderm
ectoderm
deuterostome
The animal's digestive tract forms from the _______.
endoderm
mesoderm
ecotoderm
protostome
Which of the following sequences represents the correct order of events in the formation of a human fetus?
Zygote → Blastocyst → Embryo → Fertilization
Fertilization → Zygote → Blastocyst → Embryo
Blastocyst → Embryo → Differentiation → Zygote
Fertilization → Growth → Differentiation → Zygote
