Which of the following is an example of innate immunity? MCQ with Answer and Explanation

Explanation:
Bacteria are prokaryotes with a single circular chromosome in a nucleoid region, without a nuclear membrane. They lack membrane-bound organelles like mitochondria. Their chromosomes are not linear; eukaryotes have linear chromosomes.

Explanation:
Protista includes unicellular eukaryotes such as protozoans (Amoeba, Paramecium), unicellular algae (Chlamydomonas, diatoms), and slime molds. They may be autotrophic or heterotrophic. Monera contains prokaryotes. Fungi include multicellular (except yeast) saprophytes. Plantae includes multicellular autotrophs. The protist kingdom is a 'catch-all' group for eukaryotes not fitting into fungi, plantae, or animalia.

Explanation:
Zinc is an essential micronutrient for plants, involved in the synthesis of the auxin indole-3-acetic acid (IAA) via the activation of tryptophan synthetase. Zinc deficiency causes 'little leaf' and 'rosette' diseases, stunted growth, and reduced internodes. Iron is needed for chlorophyll synthesis, manganese for photosynthesis, and boron for pollen germination.