Mention the scientific concept:
1-A functional unit in the kidney that extract urine.

Functional unit of kidney is nephron.

Explanation:

Nephron is the main functional unit of the kidney which helps in removing waste substances from the body. It consist of afferent arterioles and efferent arterioles , bowmans's capsule,  glomerulus,  proximal convoluted tubules , loop of henle, distal convoluted tubule and collecting duct. It regulates the concentration of other soluble substances like sodium  and water concentration in the body and excrete the excess fluid and waste in the form of urine.

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.