Rock that is exposed to air, and especially to changing weather, tends to break down more than rock that is covered.

Which list shows the levels of organization of an organism in hierarchical order from left to right, from the smallest to the most complex?

Which prevent errors in dna replication? a. helicase enzyme checks the dna for errors. b. each base can attach to only one other type of base. c. ribosome enzymes prevent errors from happening. d. dna contains no complementary base pairs.

An atom of nitrogen had seven protons in its nucleus. how many electrons does it have