The posterior portion of the vascular tunic is pigmented due to the presence of pigment producing cells called

Answer is choroid.

Explanation:

The vascular tunic is considered to be the middle layer of the eyeball, which comprised of three parts namely, ciliary body, choroid and Iris.

The choroid is located or found between the retina and the sclera. It is pigmented and contains melanocytes. This appears dark brown because of melanin. The melanin present, absorbs stray light rays, preventing scattering and reflection.

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.

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?