Diamonds are mined on Earth. There are also laboratory made diamonds. Why would the diamonds found on Earth be considered minerals, and the laboratory diamond would not be minerals?

A) The laboratory diamond is not a crystalline solid.
B) The laboratory diamond has excess luster to be considered a mineral.
C) The criteria for a diamond to be classified as a mineral is that is must be
naturally occurring and not be laboratory made.
D) The criteria for a diamond to be classified as a mineral is that it must be
organic, and the laboratory diamond is inorganic.

You have a solution that contains phospholipid vesicles in a test tube. these vesicles have phospholipid bilayers, but do not contain any membrane transporters. you add a number of different molecules to the solution, and wait a period of time for them to equilibrate. if you could measure the concentration of each molecule, for which of the following would you expect to measure equal concentrations inside and outside of the vesicles? assume for this question that the overall osmolarity inside and outside the vesicles is the same (that is, there is no appreciable diffusion of water across the membrane). (select two answers) an amino acid with a hydrophobic side-chain a small non-polar molecule a negatively charged ion a small polar molecule a small lipid hormone

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming