The metallic element essential for the formation of hemoglobin is: MCQ with Answer and Explanation

Explanation:
Abscisic acid (ABA) is a stress hormone that induces stomatal closure by causing efflux of K⁺ ions from guard cells, leading to loss of turgor, thereby reducing water loss during drought. Auxin and cytokinin promote growth, gibberellin stimulates stem elongation and seed germination. ABA also promotes seed dormancy and leaf senescence.

Explanation:
Azadirachta indica is the scientific name of neem, known for its medicinal and insecticidal properties. Ocimum sanctum is holy basil (tulsi), Ficus religiosa is the peepal tree, and Mangifera indica is mango. Neem belongs to the family Meliaceae. Its leaves, seeds, and oil are used in various traditional remedies and biopesticides.

Explanation:
Seed dispersal spreads seeds away from the parent plant, reducing competition for light, water, nutrients, and space. It also aids in colonization of new habitats and increases species distribution. Dispersal agents include wind, water, animals, and explosive mechanisms. Overcrowding would lead to resource limitation. Genetic diversity is promoted by cross-pollination, not directly by dispersal.