Paths of Evolution — Flashcards
Kerala Board · Class 10 · Biology
24 flashcards for Paths of Evolution (Kerala Board Class 10 Biology) to test yourself on key terms and facts. Sample: "What is Lamarckism and what is its.
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What is Lamarckism and what is its main principle?
Answer
Lamarckism is the theory proposed by Jean Baptiste Lamarck (1744-1829) known as the 'Theory of Inheritance of Acquired Characters'. Its main principle states that organisms acquire new characteristics…
Why was Lamarckism rejected by later scientists?
Answer
Lamarckism was rejected because later scientists proved that acquired characters do not cause changes in the genetic structure of organisms. Only genetic changes can be inherited, not physical changes…
Who proposed the Theory of Natural Selection and what are its five main components?
Answer
Charles Darwin (1809-1882) proposed the Theory of Natural Selection. Its five main components are: 1) Over production - organisms produce more offspring than the environment can support, 2) Variations…
What observation led Darwin to formulate his theory of evolution?
Answer
Darwin was influenced by observing the diversity in the beaks of finches at the Galapagos Islands. He noticed that different species of finches had different beak shapes and sizes adapted to their foo…
What is Neo-Darwinism and why was it developed?
Answer
Neo-Darwinism is the modern version of Darwin's theory that incorporates genetic knowledge. It was developed because Darwin's original theory lacked understanding of the genetic basis of variations an…
Define speciation and explain the process.
Answer
Speciation is the process by which new species arise from a common ancestor. The process occurs in three steps: 1) Members of a population reproduce with differences but remain as one species, 2) Popu…
What are LUCA and MRCA in evolutionary terms?
Answer
LUCA stands for Last Universal Common Ancestor - the common ancestor from which all species are thought to have descended. MRCA stands for Most Recent Common Ancestor - the most recent common ancestor…
How does molecular biology provide evidence for evolution?
Answer
Molecular biology provides evidence by comparing DNA sequences and protein structures between organisms. The more similar the molecular structures, the closer the evolutionary relationship. Example: H…
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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