The purines are:

adenine and guanine

cytosine and guanine

cytosine and thymine

ribose and deoxyribose

When water is heated in an ocean, the liquid water changs form and turns into what

A car traveling at 60 mph has how much more energy than a car going at 20 mph? K. E. increases by a factor of a there is no increase in KE b 3 times c 9 times d impossible to tell because the mass of the car is unknown

Which statement about the differences between climate and weather is correct? A. Weather forecasts try to predict average temperatures, while climate forecasts try to predict average precipitation. B.

The ultimate consequence of the sharecropping system for the south was

Consider how all animals, including human ones, communicate in some way. in your opinion, is non-human primate communication true language? why or why not?

Which of the following defines lumen? a. The opening between the duodenum and jejunum b. The intestinal enzyme that hydrolyzes dietary nucleic acids c. The conduit from the mouth to the stomach d. The continuous inner space within the GI tract e.

Is there a way to detect down syndrome/trisomy 21 in heterozygous carriers before they reproduce (become parents) ? Is there a way to detect it in a fetus? In a newborn child?

In peas, purple flowers (P) are dominant to white flowers (p), and tall plants (T) are dominant to short plants (t). A short plant with white flowers would have the genotype

What bases are are found in RNA and DNA

One of your classmates says that the pollution from his car doesn't harm the environment because the exhaust is warm and warm air will rise out of the atmosphere since it is less dense. Is your friend correct? Why or why not?