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THINKING VERSUS DOING IN BIOLOGY 581
Of what three parts is it composed? How is the stigma adapted forcarrying pollen?
B. Composite FlowersDescribe the odor. How many ray and disk flowers does the speci-
men have? Give location, color, and function of ray and disk flowers.Can you find any pistils and stamens? Give a description of them.Describe the pollen grains.
INTERPRETATIONS
1. Why may the petal of a flower be called the advertisement?2. What is the advantage of keeping bees in an orchard?3. Why is the snapdragon especially attractive to insects?4. Explain why most night-blooming flowers are white.5. How are flowers adapted for insect pollination? What is the ad-
vantage of the sticky material secreted by the stigma?6. Why do petals of an apple blossom, or in fact any flower, drop
off after fertilization takes place?7. Explain fertilization. What is the result?8. Which flowers develop more fully, those in a cluster or solitary
ones? Explain.9. What conservation laws have been made in your state to pre-
serve wild flowers?10. Why is seed conservation especially important during a war?
What care should be taken in selecting seeds? Name the largest andthe smallest seed.
11. What are the differences between wild and cultivated flowers?12. Tell how the name Jack-in-the-Pulpit came to be adopted.13. Why are flowers useful to both plant and human life?14. What flowers are adapted for growing in window boxes? Why?15. Name some flowers that are appropriate for making attractive
bouquets. Why isn^t it a good plan to pick the hardiest flowers?16. What benefits can be derived by taking care of a flower garden?17. Explain why one fig tree bears fruit, and another near by bears
blossoms but no fruit.
WHAT COLLEGE STUDENTS THINK OF USMy students in secondary science were required to select the science periodical
which in their respective opinions was most practical, most readable and in gen-eral offered the "grass roots^ science teacher the most help. All had an equivalentexposure to all of the available journals in that area. Thirty-one (31) of thirty-four (34) selected SCHOOL SCIENCE AND MATHEMATICS.
From a Teacher in a Leading College