BSCS Biology: A Molecular Approach

Chapter 10: Animal Growth and Development

Mechanisms of Cell Differentiation

1.
Scientists use a tagged, single-stranded ____ molecule as a probe to determine the genetic makeup of cells.
A)DNA
B)glucose
C)RNA
D)folic acid
2.
Frog experiments have shown that more differentiated cells are ____ produce fully developed adults.
A)more likely to
B)unable to
C)less likely to
D)always able to
3.
What is the significance of the differences among the regulatory molecules scattered throughout the cytoplasm of the egg cell?

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A)As the egg divides, similar regulatory molecules group together.
B)The differences create racial diversity in a species.
C)As the egg divides, different molecules activate different genes in the offspring cells, producing differentiation.
D)The differences seem to be insignificant.
4.
____ is the process by which a cell commits to a particular course of development.
A)determination
B)regulation
C)communication
D)hesitation
5.
Communication between the notochord and other undifferentiated ectodermal cells, called ____, is one type of developing embryonic cell-cell interaction.
A)determination
B)notochordal stimulation
C)telekinesis
D)embryonic induction
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