A mineral leaves a gray trail when scraped against an unglazed porcelain plate.

Which property of a mineral is being measured?

A.

luster

B.

streak

C.

color

D.

hardness

Who needs more energy each day? A. Athletes B. Babies C. Teenagers

Where does sea-floor spreading occur? a) on seamounts b) at convergent plates c) at divergent plates d) near the ocean surface

Describe a strategy using restriction enzymes and gel electrophoresis that would allow you identify that you have obtained the Recombinant DNA plasmid (containing YFG). Be specific indicating the techniques you would use and expected results.

Explain a benefit of having certain popular flowers available all year long

In sociological studies, which of the following form the basis of empirical research? A. Opinions B. Guess work C. Data D. All of the above

How many cells do animals have?

What four substances are recycled during photosynthesis and cellular respiration?

Human development is a complex process. Where does human development occur? A. in a structure of the female urinary system B. in a structure of the female digestive system C. in a structure of the female circulatory system D.

Why do plants not need heterotrophs

Benda logam umumnya bersifat sebagai?