Sensory clues to the possible presence of hazardous materials in water include:
a. dead fish
b. unusual algae growth
c. white froth
d. all of these

Which of the following does not describe a physical property of iron? a iron is silvery-white or gray in color. b iron has a boiling point of about 3,000°c. c iron is a magnetic element . d iron and sulfur react to form iron sulfide.

What makes a dominant allele different from a recessive allele

Biology ! the conversion of inorganic carbon to organic carbon by plants during photosynthesis is known as _[blank]_. filtration immigration reabsorption primary production