Double fertilization is a characteristic feature of: MCQ with Answer and Explanation

Explanation:
Vitamin A (retinol) is converted to retinal, which combines with opsin to form rhodopsin, the light-sensitive pigment in rod cells of the retina. Deficiency leads to night blindness and xerophthalmia. Carrots and liver are rich sources. Vitamin C is ascorbic acid, D is calciferol, E is tocopherol.

Explanation:
The Bundle of His and Purkinje fibers are part of the electrical conduction system of the heart. The Bundle of His carries the electrical impulse from the atrioventricular (AV) node down the interventricular septum. It then divides into right and left bundle branches, which terminate in the Purkinje fibers. These fibers rapidly distribute the impulse throughout the ventricular myocardium, ensuring coordinated ventricular contraction.

Explanation:
Algae are a diverse group of photosynthetic, eukaryotic organisms ranging from unicellular to multicellular forms. Protozoa are unicellular, heterotrophic eukaryotic organisms, not multicellular. Fungi typically reproduce asexually and sexually through the formation of spores, which are dispersed to form new individuals. Thus, statements 1 and 3 are correct.