With reference to minerals, the earth is a/an closed/open system.

Exlain the role of the following hormones/proteins with reference to hormonal control of human male reproductive system: GnRH

Exlain the role of the following hormones/proteins with reference to hormonal control of human male reproductive system: LH

Exlain the role of the following hormones/proteins with reference to hormonal control of human male reproductive system: Testosterone

Exlain the role of the following hormones/proteins with reference to hormonal control of human male reproductive system: FSH

Exlain the role of the following hormones/proteins with reference to hormonal control of human male reproductive system: Inibin

All the minerals are ores.

Name the minerals present in bones.