The site of communication between two neurons is called the

While a certain isotope decays, it emits photons. What kind of decay is happening? A. alpha decay B. beta decay C. gamma decay D. positron decay

In glycolysis, for each molecule of glucose oxidized to pyruvate A. 2 molecules of ATP are used and 2 molecule of ATP are produced. B. 2 molecules of ATP are used and 4 molecules of ATP are produced. C.

An example of a land feature formed by river erosion is a. alluvial fans c. soil b. deltas d. oxbow lakes

In biological systems, there are several membrane transport systems responsible for the passage of ions, such as Na^ + or K^+, or small molecules, such as glucose or amino acids, through biological membranes.

The motion of a falling object when the only force acting on it is gravity a.) net force b.) inertia c.) projectile d.) free fall

Is a candle responsive or has movement?

The gas that makes up about 21 percent of the atmosphere is?

Under the microscope, a cell shows formation of centrosomes and spindle microtubules. What will happen next?

What is a measurement of the earth's history divided into time periods A) fossil record B) sedimentary rocks C) geologic time scale D) radioactive elements

The initial organisms on earth were essentially prokaryotic heterotrophs. how did they obtain their energy?