Which of the following is a plant hormone that promotes seed germination? MCQ with Answer and Explanation

Explanation:
Secretin is a peptide hormone released by the S cells of the duodenal mucosa in response to acidic chyme entering from the stomach. Its primary action is to stimulate the pancreatic ductal cells to secrete a large volume of water and bicarbonate ions. This alkaline juice neutralizes the acidic chyme, providing the optimal pH for pancreatic digestive enzymes to function. Cholecystokinin (CCK) stimulates enzyme secretion.

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:
The bacterial cell wall is a rigid structure that provides shape and protection. It is primarily composed of peptidoglycan (also known as murein), a polymer consisting of sugars and amino acids. Gram-positive bacteria have a thick peptidoglycan layer, while Gram-negative bacteria have a thinner peptidoglycan layer and an outer membrane. Cellulose is in plant walls, and chitin is in fungal walls.