In a food chain, herbivores are called: MCQ with Answer and Explanation

Explanation:
Acetobacter aceti and related species oxidize ethanol to acetic acid (vinegar) in the presence of oxygen. This is an aerobic fermentation process. Lactobacillus produces lactic acid, Pseudomonas can spoil food, Bacillus includes various industrial strains. Vinegar is used as a condiment and preservative.

Explanation:
Drosera (sundew) is an insectivorous plant that captures insects with sticky tentacles on leaves to supplement nitrogen in nutrient-poor soils. Cuscuta is a parasitic plant, Monotropa is saprophytic, Rhizobium is a bacterium, not a plant. Insectivorous plants include pitcher plant (Nepenthes), Venus flytrap, and bladderwort. They are autotrophic but supplement nitrogen.

Explanation:
Penicillin targets the transpeptidase enzyme, blocking peptidoglycan cross-linking, leading to cell lysis. This is the mechanism, so R correctly explains A.