Inventors and Scientific Discoveries

Francesco Redi was the first to challenge spontaneous generation theory in 1668 through his famous experiment with meat in jars. He showed that maggots only appeared in meat exposed to flies, proving that life came from existing life (biogenesis), not spontaneously. Later scientists like Pasteur provided more conclusive evidence.

Jan Baptist van Helmont was a proponent of spontaneous generation theory. He conducted a famous experiment where he put a wheat grain and dirty shirt in a jar, claiming that mice appeared from nowhere. While wrong about spontaneous generation, his work influenced the debate. Option B correctly identifies him.

Fr. Suarez (Francisco Suarez) was a prominent Spanish Jesuit theologian and philosopher who strongly defended the theory of special creation - the idea that each species was independently created by God and remains immutable. This view dominated before evolutionary theory gained acceptance.

A.I. Oparin, a Russian biochemist, proposed the theory of chemical evolution (abiogenesis) in 1924, suggesting that life arose gradually from inorganic molecules through increasing complexity. J.B.S. Haldane independently proposed a similar theory (Oparin-Haldane hypothesis).

Charles Darwin proposed the Theory of Pangenesis in 1868 to explain heredity, suggesting that gemmules (tiny particles) from all body parts collect in the reproductive organs to pass on traits to offspring.

Louis Pasteur demonstrated through his swan-neck flask experiments that life arises only from pre-existing life (biogenesis), definitively disproving the theory of spontaneous generation. His work established that microorganisms come from existing microorganisms, not from non-living matter.

Robert Hooke discovered cells in 1665 by observing cork slices under a microscope. He named them "cells" because the box-like structures reminded him of the rooms where monks lived in a monastery.

Miller's 1953 experiment (with Harold Urey) simulated early Earth conditions and successfully produced amino acids, the building blocks of proteins. No nucleic acids were formed, UV radiation wasn't used, and oxygen was deliberately excluded.

Erwin Chargaff discovered that in DNA, the amount of adenine equals thymine (A=T) and guanine equals cytosine (G=C), known as Chargaff's rules. This base pairing was crucial for Watson and Crick to deduce the double helix structure. Watson and Crick built on this discovery.

William Bateson coined the term 'genetics' in 1905 and founded the discipline. Mendel discovered inheritance patterns, Watson co-discovered DNA structure with Crick, and Johnson was a geneticist who translated Mendel's work but did not coin the term.

Robert Hooke discovered and coined the term 'cell' in 1665 when observing cork under a microscope. Leeuwenhoek later improved microscopy but did not name cells. Schleiden and Schwann developed cell theory nearly two centuries later, not cell discovery.

Rudolf Virchow stated 'Omnis cellula e cellula' (all cells come from cells) in 1858, completing cell theory. Leeuwenhoek observed microorganisms, Robert Brown discovered the nucleus, and Pasteur disproved spontaneous generation.

The 'Backwash Effect' was introduced by Nobel laureate Gunnar Myrdal. It describes how prosperous regions attract resources (capital, labor) from poorer regions, widening regional inequalities - the opposite of 'spread effects'.