Swarmer cells are a. formed by myxobacteria. b. formed by sheathed bacteria. c. also known as coliforms. d. part of the green nonsulfur bacteria.

Option B, sheathed bacteria

Explanation:

Swarmer cells  is basically a stage of lifecycle of bacteria during which the bacteria exists in free swimming form known as swarmer cell stage. In this stage, the cells are not sheathed but they get sheathed in later stage thereby forming sheathed bacteria. Usually these sheathed bacteria grow as long filaments and are covered by sheath from the exterior side. In swarmer cell stage, the cell length increases along with number of flagella per cell.

hence, option B is correct.

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.