Which of the following is a correct statement about biofertilizers? MCQ with Answer and Explanation

Explanation:
Mutations are random changes in DNA that create new alleles, providing the raw genetic variation necessary for natural selection. Genetic drift is the random change in allele frequencies, which has a significant effect primarily in small, isolated populations, not large ones. Geographic isolation prevents gene flow between populations, eventually leading to reproductive isolation and speciation. Thus, statements 1 and 3 are correct.

Explanation:
The gall bladder is a small sac under the liver that stores and concentrates bile produced by the liver, releasing it into the duodenum when needed for fat digestion. The liver makes bile, pancreas produces digestive enzymes, duodenum is the entry point.

Explanation:
Vitamin K is essential for the synthesis of clotting factors (II, VII, IX, X) in the liver. Deficiency leads to prolonged clotting time and excessive bleeding. Vitamin A is for vision, C for collagen (scurvy causes bleeding gums but not clotting defect), D for bones. Newborns receive vitamin K injection to prevent hemorrhagic disease. Green leafy vegetables are rich sources.