The animal that lays eggs and has a beak but no teeth is: MCQ with Answer and Explanation

Explanation:
Propionibacterium shermanii ferments lactate to propionic acid, acetic acid, and CO₂ during cheese ripening; the CO₂ forms the characteristic holes (eyes) in Swiss cheese. Lactobacillus and Streptococcus are starter cultures for acid production, Penicillium roqueforti is used for blue cheese.

Explanation:
Transduction is the transfer of bacterial DNA from one bacterium to another by a bacteriophage. Generalized transduction occurs when phage accidentally packages host DNA; specialized transduction involves specific genes near the prophage integration site. Conjugation needs direct contact, transformation free DNA.

Explanation:
Pneumatophores are negative geotropic, spongy roots that grow upwards out of the water or mud to obtain oxygen in anaerobic, waterlogged soils. They are a characteristic adaptation of mangrove plants like Rhizophora (mangrove). Orchids have epiphytic aerial roots, Cuscuta has parasitic haustoria, and Nepenthes has modified pitcher leaves for insectivory.