Using microscope slides and dipping them into the boiling hot springs at yellowstone national park, scientists were able to collect these organisms. they are unicellular, prokaryotes with a cell wall. what are they?

The correct answer is-

Archaebacteria.

Archaebacteria is a domain of unicellular micro organisms, which constitute a group of most primitive forms of prokaryotes ( that is devoid of nucleus and membrane bound subcellular organelles). The organism under this domain are adapted to survive under extremely harsh conditions ( therefore also called extremophiles) such as boiling mud around volcano, hotsprings.

Example- Methanogens.

In the question, scientists were able to collect the organisms by using microscope slides, which were dipped into the boiling hot springs.

Thus, it represents the organisms collected were Archaebacteria.

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.