Answer:
B. Color is the best way to identify a mineral.
Mineral can be defined as an inorganic substance obtained from the rocks or other geological deposits. A mineral can be differenciated from other minerals by examining the physical and chemical properties. Physical properties includes the color, luster, texture and other. Chemical properties includes the composition of the minerals.
Color is best way to identify a mineral in rose quartz and smoky quartz. The rose quart is pink in color whereas the smoky quartz is gray in color. The color should not only identified by examining the mineral superficially but the streaking of the mineral should be performed to determine the actual color from the sediment.
Answer:
A. Gas is added to the bladder as the fish's depth increases.
Explanation:
The swim bladder is a gas-filled organ localized in the dorsal region of Osteichthyes (bony fish) that allows them to regulate buoyancy, thus maintaining water depth without swimming. Since the swim bladder localizes in the dorsal region, it also functions as a stabilizing organ. This organ is composed of two sacs whose walls contract and expand in response to water pressure. The swim bladder contains an oval window that enables to adjust buoyancy in order to maintain a constant depth, or to ascend or descend in a wide range of water depths.
Answer:
Protein molecules.
Explanation:
Protein, highly complex substance that is present in all living organisms. A chain of amino acid residues is called a polypeptide which is a bond form by the carboxylate ion on one end and the -Nh2 on the other end via condensation reaction.
Proteins are large biological molecules (macromolecules), which consists of one or more long chains of amino acid residues. Proteins perform certain functions in organisms like Enzymes - catalysing metabolic reactions, DNA replication, responding to stimuli, providing structure to cells, transporting molecules from one location to another etc.
Proteins differ from one another in their amino acid sequence, which is dictated by the nucleotide sequence of their genes, which usually results in protein folding into a three-dimensional structure that determines its activity.