Page 71 - Science Course 2 (Book 1)
P. 71
Mo3-L1b: How do Humans Grow and Develop?
Key Concept During later adulthood, hair turns gray, wrinkles
might form in the skin, and bones become weaker in
How Do Humans Grow and Develop? a process called aging.
How do humans change during adulthood?
SUMMARY
How Do Humans Grow and Develop?
During pregnancy, a zygote develops into an
embryo and then into a fetus.
Mo3-L1: Vocabulary Review
Direction: Explain the relationship between the terms in each pair on the lines provided. Use complete
sentences.
1. sperm, ovum
2. gamete, fertilization
3. sperm, gamete
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