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Detailed Explanation: Variation Video Lecture | Quantitative Aptitude (Quant) - CAT
FAQs on Detailed Explanation: Variation Video Lecture - Quantitative Aptitude (Quant) - CAT
| 1. What is variation in the context of biology? |  |
Ans. Variation in biology refers to the differences in physical traits and genetic makeup among individuals within a species. These differences can be caused by genetic factors, environmental influences, or a combination of both, and they play a crucial role in the process of evolution and natural selection.
| 2. What are the types of variation found in organisms? | |
Ans. There are two main types of variation: genetic variation and environmental variation. Genetic variation arises from mutations, gene recombination, and other genetic processes, leading to differences in traits. Environmental variation occurs due to differences in environmental factors, such as climate, nutrition, and habitat, which can influence an organism's phenotype without altering its genotype.
| 3. How does variation contribute to natural selection? | |
Ans. Variation is essential for natural selection because it provides the raw material upon which selection can act. When individuals within a population exhibit different traits, those traits can affect their survival and reproduction. Over time, advantageous traits become more common in the population, leading to evolutionary change.
| 4. Can environmental factors cause variation in organisms? | |
Ans. Yes, environmental factors can lead to variation in organisms. For example, factors like availability of food, climate conditions, and exposure to different habitats can influence an organism's growth, development, and overall phenotype, leading to observable differences between individuals.
| 5. Why is studying variation important in genetics and evolution? | |
Ans. Studying variation is important because it helps scientists understand the mechanisms of evolution, the adaptability of species, and the genetic diversity within populations. This knowledge is crucial for conservation efforts, agriculture, and understanding human health and disease.
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