Which of the following objects could be used to model the structure of a DNA molecule? A. a snowflake
B. a ladder
c. a three-dimensional cube
D. a branching tree

Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.

This group of organisms perform the process of ammonifcation. a. herbivores b. decomposers c. carnivores c. plants

49 ! how are energy cycles and growth cycles related?