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Heredity and Evolution (Question Answer)

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  Heredity and Evolution (Question Answer) QUESTIONS 1. If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?  Answer: B trait has arisen earlier because it exists in maximum population. 2. How does the creation of variations in a species promote survival? Answer:  The variations created in a species protects the organism from extinction even in adverse conditions. As a result, the organism gains stability. Helps to adapt to the changing environment of the natural environment. 3. How do Mendel’s experiments show that traits may be dominant or recessive?  Answer:  Mendel used a number of contrasting visible characters of garden peas – round/wrinkled seeds, tall/short plants, white/violet flowers and so on. He took pea plants with different characteristics – a tall plant and a short plant, produced progeny from them, and calculated the percentages of tall or short pr
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Life processes(Question Answer)

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  Life processes(Question Answer) QUESTIONS 1. Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?  Answer:  The body structure of multicellular organisms is very complex and they have some special cells and tissues for each function in the body. Therefore, multicellular organisms need more oxygen. Therefore, it is not enough to obtain the required oxygen through the diffusion process alone. 2. What criteria do we use to decide whether something is alive?  Answer:   An organism can be identified as living or dead by observing its various movements.  3. What are outside raw materials used for by an organism?  Answer:  An organism needs a variety of raw materials to survive. Some of these substances are food for heterotrops and carbon dioxide (CO 2 ), water, oxygen (O 2 ), various minerals for autotrophs. 4. What processes would you consider essential for maintaining life? Answer:  The most important processes for maintaining life are-   
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