446 



THE BIOLOGY OF HYDRA : 1961 



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Fig. 5. DNA, RNA, and protein content of buds dissected from 10 medium 

 bud stage Hydra, and of the parents remaining after dissection. 



parent size is shown in Figure 6. The first sets of measurements 

 were made before the animals were fed. The last measurement was 

 made two days after the third feeding. The results show that the pro- 

 tein and RNA increased to that of the small bud stage Hydro. In 

 contrast, the DNA, which was high initially, decreased slightly. 

 Consequently, the DNA/protein ratio decreased until it approached 

 that of the parent Hydra in the small bud stage. 



The consistent finding of this study was the relatively high 

 DNA/protein ratio of buds (Figs. 4, 5, 6). Consequent with growth, 



