BSCS Biology: A Molecular Approach

Chapter 10: Animal Growth and Development

Developmental Diversity

1.
Similar genes in many animals are responsible for ____, division of the body into a number of similar sections.
A)activation
B)differentiation
C)fertilization
D)segmentation
2.
The development of mammals is unique because the embryo develops within ____.
A)the mother
B)a gastrula
C)a period of only minutes
D)a hard shell
3.
Which part of the human blastocyst, shown here, will eventually become the embryo?

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A)The outer ring of cells.
B)The thick mass of cells on the left.
C)The hollow space in the center.
D)The blastocyst does not form an embryo.
4.
After the beginning of the eighth week of development, the embryo is called a ____.
A)baby
B)blastocyst
C)placenta
D)fetus
5.
Spina bifida and anencephaly are two types of defects in the developing ____.
A)neural tube
B)fingers
C)legs
D)heart
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