Gymnosperm, any vascular plant that reproduces by means of an exposed seed, or ovule—unlike angiosperms, or flowering plants, whose seeds are enclosed by mature ovaries, or fruits. The seeds of many gymnosperms (literally “naked seeds”) are borne in cones and are not visible until maturity.
You would expect a scratch on the quartz since quartz is on a hardness scale of 7 and the mineral you are rubbing against it is at a hardness scale of 7.5
The main function of cholesterol in our brain is that it initiates information synthesis and it also involved in excretion of glands. In addition, it signals the central nervous system when a new memory or knowledge is acquired although if it exceeds would cause mental disorders like Alzheimer's.
Answer:
remove waste and other harmful substances from the body
Explanation:
