Matching. Choose the one best answer for each

Question

numbered item.
1. ___ animal pole
2. ___ cleavage
3. ___ controlled cell death
4. ___ differentiation
5. ___ embryonic induction
6. ___ fertilization
7. ___ fission
8. ___ gastrula
9. ___ gastrulation
10. ___ gray crescent
11. ___ morphogenesis
12. ___ organogenesis
A. visible marker of the site where an
amphibian’s body axis will be established
and where gastrulation will begin
B. the formation of two or three embryonic
tissue layers
C. the fusion of male and female nuclei
D. the entire body divides transversely; each
half grows and regenerates the missing
part
E. selective gene expression results in
different cell types
F. subdividing of the zygote by mitosis; no
growth occurs
G. region of zygote that has less yolk and is
pigmented
H. an embryonic stage of development that
has three primary tissue layers before
organogenesis begins
I. the formation of organs
Chapter 43 Animal Development 511
J. one body part develops in response to
signals from an adjacent part
K. the growth, shaping, and spatial
coordination of tissues and organs so that a
predefined pattern of the whole organism
results
L. occurs in the formation of the human hand

Answer 1