#Question id: 3697
#3. Fundamental Processes
In the Meselson-Stahl DNA replication experiment, what percent of the DNA was composed of one light strand and one heavy strand after one generation of growth in 14N containing growth media?
#Question id: 4941
#11. Evolution and Behavior
Which of the factors below weaken the hypothesis of abiotic synthesis of organic monomers in early Earthʹs atmosphere?
1. the relatively short time between intense meteor bombardment and appearance of the first life forms
2. the lack of experimental evidence that organic monomers can form by abiotic synthesis
3. Uncertainty about which gases comprised early Earthʹs atmosphere
#Question id: 14482
#13. Methods in Biology
#Question id: 9190
#9. Diversity of Life Forms
What is the probable role of salicylic acid in the defense responses of plants?
#Question id: 12374
#10. Ecological Principles