The biodegradable plastic PHB (polyhydroxybutyrate) is produced by: MCQ with Answer and Explanation

Explanation:
Kingdom Monera includes all prokaryotic organisms, which lack a true nucleus and membrane-bound organelles. Cyanobacteria (blue-green algae) are prokaryotes and thus belong to Monera. Amoeba is a protist, while yeast and mushrooms are fungi, which belong to the Kingdom Fungi and are eukaryotic.

Explanation:
Bacteria lack a true nucleus; their circular chromosome is concentrated in a region called the nucleoid. Plasmids are extra-chromosomal DNA but the main genome is in the nucleoid. Eukaryotes have a membrane-bound nucleus.

Explanation:
African sleeping sickness (trypanosomiasis) is caused by the protozoan Trypanosoma brucei, transmitted by the tsetse fly (Glossina). Malaria is by Plasmodium (Anopheles mosquito), filariasis by Wuchereria (Culex), yellow fever by a virus (Aedes). Sleeping sickness affects the central nervous system, causing lethargy, coma, and death if untreated.