the model of DNA used today was proposed by James Watson and Francis Crick in 1953 in this model what sequence of bases would be complementary to A-G-C-T-A?

In plants that undergo double fertilization, the structure that forms to nourish the seed is called

List at least 5 differences between bacteria and viruses

How does composting influence resource availability?

Charles Darwin was influenced by Charles Lyell, who proposed that geological processes had reshaped Earth over long periods of time. Which unexpected finding during Darwin's voyage supported Lyell's ideas?

According to theories of how life began, how did early organic molecules begin to separate from the outside world?

Temperature, pH, and ionic concentrations each play an important role in the proper functioning of enzymes.

What was the purpose of the vinegar in the third trial? a. test the effect of raising pH on enzyme action b. test the effect of lowering pH on enzyme action c. serve as a control d. served no purpose

How do substances move in passive transport?

Atmosphere: is mostly made of nitrogen is weightless protects earth from harmful radiation contains water vapor is affected by events in the hydrosphere

According to this species-area curve for reptiles and amphibians on a west indian archipelago, a 50% decrease in area will change the number of species living in the remaining area by