The process of formation of blood cells is called: MCQ with Answer and Explanation

Explanation:
Charles Darwin, an English naturalist, proposed the theory of evolution by natural selection in his book 'On the Origin of Species'. Gregor Mendel, an Austrian monk, conducted experiments on pea plants and proposed the fundamental laws of inheritance (segregation and independent assortment). Robert Hooke discovered cells in cork tissue; the cell nucleus was discovered later by Robert Brown. Thus, statements 1 and 2 are correct.

Explanation:
The stapes (stirrup) in the middle ear is the smallest bone, measuring about 3 mm. It transmits sound vibrations to the inner ear.

Explanation:
Magnesium (Mg²⁺) is the central atom in the porphyrin ring of chlorophyll, essential for absorbing light energy during photosynthesis. Iron is central in heme (hemoglobin, cytochromes). Calcium is a secondary messenger and structural component, zinc is a cofactor. Magnesium deficiency causes chlorosis.