Check all the characteristics below that describe
elements.
one type of atom
a pure substance
more than one type of atom
chemically combined elements

Some tools have graduations to show multiple measurements. for example, a ruler may have graduations for both millimeters and centimeters. when measuring the length of an earthworm, which graduations would allow for the most accurate measurement? millimeters centimeters decimeters meters

What should be the strand of complementary dna produced by the strand of dna shown below cgt ata

How do disease caused by bacteria and disease caused by viruses react to antibiotics