On a hot day, the upstairs rooms in a house are usually hotter than the downstairs rooms. Why? A. Cool air is less dense than warm air. B. Warm air rises and cool air sinks. C. The upstairs rooms are closer to the sun. D. Heat rises.

Jane has a toothache, and her doctor gave her a prescription that states: "paracetamol tabs 200 mg bid po." what does this prescription say, in spelled-out form?

Cella of a multicellular organisms are specialized. What does this statement mean?

What is gene G responsible for in these fruit flies

Carbon dioxide is returned to the atmosphere primarily by the

Describe the path of two parallel light beams in a flat universe

As sales tax is s type of

Which foods should be minimized in the diet of an athlete managing gastroesophageal reflux disease (GERD) ?

What are karyotypes? How are they different than Punnett squares?

A genetic factor that blocks another genetic factor

Match each moon or planet to the most accurate characteristic. A. Earth's moon Scientists believe it used to have flowing liquid water. B. Venus It is too hot for liquid water to exist. C. Europa It has no atmosphere due to weak gravity. D.