Question

A cellular slime moulds show
A. Haploid uninucleate plasmodium
B. Naked sporangia
C. Autotrophic nutrition
D. Spores with true walls

Answer 1

After the development of the spores, they receive a diploid nucleus and meiosis takes place in the spore. At the time of germination, they are divided into half. The cellular slime molds function as independent amoeboid cells when nutrients are abundant.

Step by step answer: Myxogastria or myxomycetes is a class of slime moulds that has 888 species. They are colloquially known as the plasmodial or acellular slime moulds. They are more common in temperate regions. The organisms are visible with the naked eye. The spores of myxogastria are haploid, mainly round. Their surface is generally reticular, sharp, warty, or spiky and very rarely smooth. The colour and shape of spores are important characteristics for identifying species. Slime moulds feed primarily on bacteria and fungi and contribute to the decomposition of dead plants. They are saprophytes.
Naked sporangia are seen in the sporangium of cellular slime mould.
Autotrophic nutrition in which organisms make their own food with the help of simple inorganic material like carbon dioxide and water, in the presence of light. Examples are blue-green algae and cyanobacteria.
Spores with true walls in which the cell wall which completely protects the spores over the fruiting bodies in slime moulds.
Plasmodium is the second tropic phase that begins with the development of the plasmodium. Under suitable conditions, they form an aggregation called plasmodium which is haploid and uninucleate.
Hence option B is correct.

Note: Those species which reproduce sexually, haploid cells bud from the spores. Slime moulds resemble both protozoa and the true fungi. They are like protozoan in their amoeboid plasmodial stage and similar to true fungi in spore formation.