Suppose you have two minerals. one mineral fractures into rough pieces, and a second mineral breaks into pieces with smooth surfaces.

what does this indicate?

a.
the second mineral is older than the first mineral.

b.
the two minerals have a different arrangement of their atoms.

c.
the second mineral is harder than the first mineral.

d.
only the second mineral has crystalline structure.

Brainliest ! which would require more force to move or slow down between a bowling ball and a soccer ball? explain why?

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.

Which of the following happened during the precambrian era? the first prokaryotic cells the first eukaryotic cells development of photosynthesis all of the above