STP conditions imply a temperature of 273.15 K and a pressure of 100 kPa. When tose conditions are met, 1 mole of any ideal gas will have a volume of 22.7 L. So, if 1 mole occupies a volume of 22.7 L, 2 moles will occupy a volume twice as big. Likewise, 0.5 moles will occupy half the volume 1 mole occupies.
Humans have selectively bred plants and animals for thousands of years including: crop plants with better yields.
Answer:
the kidney control the amount of water, ion, and other substances in the blood by excreting more or less of them in urine, also secretes the hormones that help maintain homeostasis
