In a controlled experiment,

A. a control group is compared with one or more experimental groups.

B. there are at least two variables.

C. all factors should be different.

D. a variable is not needed.

Which best describes a way that the periodic table is arranged? The metalloids are placed in two separated rows at the bottom of the table. The nonmetals are grouped together, which the exception of hydrogen. The nonmetals are all in the same column.

explain why a heavy rainfall on a fruit orchard in the spring (when it is flowering) might result in a poor fruit yield in the fall.

The breakdown of glucose to atp and pyruvic acid is called

Which statement represents a valid conclusion based on data? A. Ounce of fat contains about twice as many calories as an ounce of protein. B. Protein is a better energy food than carbohydrate. C.

Does the DNA into people who are not related use the same neck to base pairs

The proteins around which human DNA is wound are (A) cyclins. (B) cyclin-dependent kinases. (C) histones. (D) heat-shock proteins. (E) G proteins.

Which of the following were lasting effects of jackson's Indian removal program to the native American?

A scientist recently discovered a pond organism that is unicellular, contains chloroplasts and other membrane-bound organelles, and has a flagellum. in which kingdom is this organism classified?

When the skydiver jumps of the plane what force acts on her that causes her to fall

Match the geologic feature with its description. 1. seamount over 1 mile in diameter; looks like a bowl over a volcano 2. syncline underwater volcano that never reaches above sea level 3. hot spring on rolling hills, this a dip between hills 4.