The substance used to preserve dead biological specimens is: MCQ with Answer and Explanation

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:
Gregor Mendel, an Austrian monk, is known as the 'father of genetics' for his pioneering experiments on inheritance in the garden pea plant (Pisum sativum) between 1856 and 1863. He studied seven pairs of contrasting traits and formulated the fundamental laws of inheritance: the Law of Segregation and the Law of Independent Assortment, which form the basis of classical genetics.

Explanation:
Folate (B₉) and vitamin B₁₂ are required for DNA synthesis. Deficiency leads to impaired cell division in bone marrow, producing large, immature erythrocytes (megaloblasts), causing megaloblastic anemia. Iron deficiency causes microcytic anemia.