Which of the following indicates that different rocks in the same area might weather differently? select the two correct answers.
a. cliffs with ridges
b. rock pillars in the middle of grassy plains
c. the rock atop a newly formed mountain
d. a smooth plain

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.

How does the carbon cycle involve an exchange of carbon

Recombinant dna is the merging of dna from unrelated organisms to create new genetic varieties is assembled in the lab from mononucleotides was part of the green revolution of the 1960s is pollination of one plant by another of the same species is cross-pollination of one plant by a different species