Page 239 - Canadian BC Science 9

6-2C
Comparing Differentiation in Embryos
Find Out ACTIVITY
Some animals have similar patterns of differentiation and development. In this activity, you will compare embryonic development in six embryos.
What to Do
1. Study the diagram below. The embryos are shown at three stages of embryonic development. Predict which series of embryos shows the development of a chicken, fish, human, rabbit, salamander, and tortoise.
2. List and describe three similarities and three differences in development among the embryos shown below.
3. Compare your findings with those of another group.
I
II
III
What Did You Find Out?
1. Were you able to predict which types of embryos are shown in the first stage of development? Explain.
2. At what stage of embryonic development does differentiation become most apparent?
3. Using the information you have learned in this chapter, explain why the organisms shown below appear to be similar in stage 1, but not in later stages of development.
Chapter 6 Meiosis is the basis of sexual reproduction. • MHR 221