Biological Classification

Answer (b) Oospore, ascospore, basidiospore

As, fungi are heterotrophic in their mode of nutrition, so they are saprophytic, parasitic and symbiotic. Saprophytic fungi are those which grow on dead organic matter (Mucor). Parasitic fungi obtain their food from living hosts (Erysiphe). Symbiotic fungi (Ascomycetes and Basidiomycetes) live in symbiotic association with algae and form lichen thalli.

Cyanobacteria is a phylum consisting of two groups of photosynthetic eubacteria (Cyanophyta or Chloroxybacteria). They are unicellular but sometimes become joined in colonies or filaments by a sheath of mucilage. They occur in all aquatic habitats. A few species fix atmospheric nitrogen and thus, contribute to soil fertility. In eutrophic warm ponds and lakes, certain cyanobacteria can reproduce rapidly to form blooms.

Bacteria are a group of prokaryotic organisms or monera as they have naked circular folded to form nucleoid. They are also characterised by peptidoglycan wall and reserve food made of glycogen and fat.

The correct answer is D:Double stranded DNA
Bacterial viruses have double stranded DNA structure.The components of bacterial viruses are head(capsid), tail, tail fibres, base plate etc. The
complexity allows the bacteriophage to infect the bacterial hosts.The dsDNA within the page carries the instructions that are needed to replicate
it in the host.