The organism that causes sleeping sickness is transmitted by: MCQ with Answer and Explanation

Explanation:
Pellagra is characterized by dermatitis, diarrhea, dementia, and if untreated, death (the four Ds). It results from deficiency of niacin (vitamin B₃) or its precursor tryptophan. Scurvy is vitamin C deficiency, rickets vitamin D, beriberi vitamin B₁ (thiamine). Niacin is a component of coenzymes NAD and NADP, essential in redox reactions. Pellagra historically common in corn-based diets.

Explanation:
Robert Hooke, an English scientist, is credited with the discovery of cells in 1665. He observed a thin slice of dead cork tissue from an oak tree under a primitive compound microscope. He saw a honeycomb-like structure of small compartments, which he called 'cells' (from the Latin 'cella', meaning small room). He was actually observing the non-living cell walls of dead plant cells.

Explanation:
Carolus Linnaeus, a Swedish botanist, is known as the father of taxonomy for formalizing the modern system of naming organisms (binomial nomenclature) and classification. Louis Pasteur, a French chemist, is considered the father of microbiology for his groundbreaking work on vaccination, microbial fermentation, and pasteurization. Gregor Mendel, an Austrian monk, is universally recognized as the father of genetics for his pioneering experiments on inheritance in pea plants. All statements are correct.