GED Science Question of the Day

1. The theory of evolution
2. The law of independent assortment
3. The concept of spontaneous generation (correct answer)
4. The process of sexual reproduction

Explanation: When you encounter questions about cell theory, focus on the three fundamental principles: all living things are made of cells, cells are the basic unit of life, and all cells come from pre-existing cells. This third principle was revolutionary because it directly challenged a widespread belief about how life could begin. The concept of spontaneous generation held that living organisms could arise from non-living matter under certain conditions. People believed maggots spontaneously appeared in rotting meat, mice emerged from grain stores, and microorganisms developed from nothing in broths. Scientists like Francesco Redi and Louis Pasteur conducted controlled experiments that disproved this idea, showing that life only comes from existing life. This work directly supported cell theory's principle that cells arise only from pre-existing cells through processes like cell division. Looking at the wrong answers: Choice A is incorrect because evolution describes how species change over time through natural selection, which actually works alongside cell theory rather than contradicting it. Choice B refers to Mendel's law about how different genes are inherited independently, which is unrelated to cell origins. Choice D describes sexual reproduction, a biological process that involves existing cells combining to create new organisms—this supports rather than contradicts the idea that cells come from pre-existing cells. For GED Science questions about historical scientific concepts, remember that many involved replacing old misconceptions with evidence-based understanding. Spontaneous generation versus cell theory is a classic example of how careful experimentation overturned long-held but incorrect beliefs about life's origins.