What is the difference between a theory and an observation

During the early stages of meiosis, two chromosomes in a homologous pair may exchange segments, producing genetic variation in sex cells. This process of exchange is called

According to the law of conservation of energy, when a lawn mower uses 750 J of chemical energy from gasoline, how much of this energy will be transformed into mechanical, sound, or energy? A. 325 J B. 750 J C. 162 J D. 1500 J

A general term for a chemical which accelerates a reaction without becoming chemically involved is called a catalyst. true false

Explain why liquids unlike gases are virtually incompressible

What is the name of the smaller units that compose nucleic acids? A. DNA B. RNA C. nucleotides D. nucleic molecules

In a convection current, why does cool air take the place of warmer air? A. Cool air is less dense than warm air, so it sinks to take the place of rising warm air. B. Cool air is denser than warm air, so it sinks to take the place of rising warm air.

Where would the gravitational attraction between the earth and moon be the weakest

According to the all-or-none principle, what would happen if a cell were depolarized twice the normal amount needed to produce an action potential?

An element with characteristics of a metal and a non-metal

You have a 70% solution of dextrose. how many grams of dextrose are in 400 ml of this solution?