3. A geologist examines the properties of an unknown sample. The results are shown in the table.
Measurements and Test Results
and
Is can be
is transparent and slightly pink
• breaks into regularly shaped pieces
• has a glassy luster
• has a white streak
• can be scratched by a penny but not by a fingernail
m.
nds,
I to
Based on the observable properties, what is the mineral
most likely to be?

cell regulation is conducted by special proteins.

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.

the last one: artificial selection/genetic engineering

plant breeding is modifying the genetic composition of the plant - but this isn't cloning (which is specifically introducing a gene into a genome). but you are artificially selecting for the phenotype that you want.

the second one is literally genetic engineering - the gene would have been cloned first and then inserted or genetically engineered into the new plant cell (the cotton).