AP BIOLOGY

Detailed explanation-1: -Bacteria and fungi are called decomposer because they break down the dead and decaying organic matter into a simpler substance. It provides the nutrients back to the soil.

Detailed explanation-2: -Most decomposers are microscopic organisms, including protozoa and bacteria. Other decomposers are big enough to see without a microscope. They include fungi along with invertebrate organisms sometimes called detritivores, which include earthworms, termites, and millipedes.

Detailed explanation-3: -Pleurocybella porrigens, a species that causes white rot in conifers. Mushrooms that get their nutrients by digesting dead or decaying organic matter such as leaves, pine needles, and wood are known as saprobes.

Detailed explanation-4: -Decomposers. Bacteria play an important role in decomposition of organic materials, especially in the early stages of decomposition when moisture levels are high. In the later stages of decomposition, fungi tend to dominate. Bacillus subtilis and Pseudomonas fluorescens are examples of decomposer bacteria.

Detailed explanation-5: -Fungi are the main decomposers in many environments. Some examples of fungi are yeasts, molds, and mushrooms. Fungi have hyphae, which are branching filaments, and these hyphae are able to enter organic matter, making fungi effective decomposers.