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Barbara Mc Clintock is famous for her wo...

Barbara Mc Clintock is famous for her work on (discovery of transposons)

A

rice

B

wheat

C

maize

D

sugarcane

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**Step-by-Step Solution:** 1. **Identify the Scientist**: The question asks about Barbara McClintock, an American scientist known for her significant contributions to genetics. 2. **Understand the Contribution**: Barbara McClintock is renowned for her discovery of transposable elements, commonly referred to as "jumping genes." These are segments of DNA that can move around to different positions within the genome of a single cell. 3. **Determine the Model Organism**: To understand the context of her research, it's important to know that she used a specific plant as her model organism in her studies. 4. **Identify the Plant**: The options provided are rice, wheat, maize, and sugarcane. Barbara McClintock conducted her groundbreaking research primarily using maize. 5. **Conclusion**: Based on her work with maize and the discovery of transposons, the correct answer to the question is maize. **Final Answer**: Barbara McClintock is famous for her work on maize, specifically for the discovery of transposons. ---
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Einstein's mass - energy relation emerging out of his famous theory of relativity relates mass (m) to energy (E ) as E = mc^2, where c is speed of light in vacuum. At the nuclear level, the magnitudes of energy are vary small. The energy at nuclear level is usually measured in MeV, where 1 MeV = 1.6 xx 10^(-13) J , the masses are measured in unified mass unit (u) where 1 u = 1.67xx10^(-27)kg. (a) Show that the energy equivalent of 1u is 931.5 MeV. (b) A student writes the relation as 1 u = 931.5 MeV. The teacher points out that the relation is dimensionally incorrect. Write the correct relation.