1.
Drag and drop
the events of embryonic development to the correct location in the diagram.
·
Fertilization
initiates the process of embryonic development
·
Cleavage
produces a mass of smaller cells in the embryo
·
Gastrulation
produces 3 cell layers called ectoderm, mesoderm, and endoderm
·
Neurulation
produces the future nervous system; during this time, a segmented body plan
also develops
·
Organogenesis
results in tissues becoming organized into functional organs composed of
differentiated cells
·
Development and
growth continue as the embryo matures through larval stage to adulthood
2.
Match each
developmental event with the correct end result.
Fertilization: zygote forms
Early cell divisions: blastula forms
Gastrulation: 3 germ layers form
Neurulation: body segments form
Organogenesis: process is controlled by Hox genes
3.
A positive
feedback loop causes a self-amplifying cycle where a physiological change leads
to even greater change in the same direction.
true
4.
The process by
which cells acquire specialized forms and functions is called cell
differentiation
5.
The stage of
development that involves cell division without cell growth is cleavage
6.
The endoderm is
a germ cell layer that tends to cover the embryo. false
7.
The outcome of
cleavage during embryonic development is the production of a blastula
8.
The process by
which a fertilized egg becomes a distinct organism is called embryonic
development
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