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Write in what context did Darwin use the...

Write in what context did Darwin use the terms ' fitness', survival and selection while elaborating on the mechanism of evolution.

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To answer the question regarding the context in which Darwin used the terms 'fitness', 'survival', and 'selection' while elaborating on the mechanism of evolution, we can break it down into several key points: ### Step-by-Step Solution: 1. **Introduction to Darwin's Theory**: - Charles Darwin is known for his theory of natural selection, which he developed based on his observations of species, particularly during his visit to the Galapagos Islands. 2. **Definition of Fitness**: ...
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What is meant by the term Darwin fitness?

Hydrogen Atom and Hydrogen Molecule The observed wavelengths in the line spectrum of hydrogen atom were first expressed in terms of a series by johann Jakob Balmer, a Swiss teacher. Balmer's empirical empirical formula is 1/lambda=R_(H)(1/2^(2)-1/n^(2))," " N=3, 4, 5 R_(H)=(Me e^(4))/(8 epsilon_(0)^(2)h^(3) c)=109. 678 cm^(-1) Here, R_(H) is the Rydberg Constant, m_(e) is the mass of electron. Niels Bohr derived this expression theoretically in 1913. The formula is easily generalized to any one electron atom//ion. A formula analogous to Balmer's formula applies to the series of spectral lines which arise from transition from higher energy levels to the lowest energy level of hydrogen atom. Write this formula and use it to determine the ground state energy of a hydrogen atom in eV. A 'muonic hydrogen atom' is like a hydrogen atom in which the electron is replaced by a heavier particle, the muon. The mass of a muon is about 207 times the mass of an electron, while its charge is the same as that of an electron. A muon has a very short lifetime, but we ignore its ubstable nature here.

Darwin in his 'Natural Selection Theory' did not believe in any role of which one of the following in organic evolution

Darwin in his 'Natural Selection Theory' did not believe in any role of which one of the following in organic evolution

Darwin in his 'Natural Selection Theory' did not believe in any role of which one of the following in organic evolution

Which of the following statements about natural selection are correct? (i) Tends to increase the characters that enhance survival and reprocution (ii) Inviduals with better adaptive ability leave more progeny (iii) Was considered as mechanism of evolution by Darwin

Given below are four statements (A–D ) each with one or two blanks. Select the option which correctly fills up the blanks. Statements : (A) Miller and Urey while creating probable conditions on the primitive earth in the laboratory used mixture of methane, water vapour , hydrogen , and ........(i)...... (B) Information of extinct organisms can be obtained by the help of ....(i) .... evidence which can be very easily isolated from ....(ii) .... types of rocks . (C) Darwin selection can be concluded with the introduction of ...(i)... in organisms . (D) Natural selection can be concluded with the introduction of ........(i).......in organisms.

Write a rate expresison for each speices. Assuming [B] is constant, write a rate expresison for [A] and [C] so that they do not contain [B] term. Under what conditions will the reaction be pseudo first order to second conditions will the reaction be pseudo first order to second order ? Mechanism of reaction is A underset(k_(2))overset(k_(1))hArr B {:(B+Aoverset(k_(3))rarrC:}/{:(2ArarrC)/

XII BOARD PREVIOUS YEAR PAPER ENGLISH-XII BOARDS-SECTION-C
  1. Different animals respond to changes in their surroundings in differen...

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  2. (a) Name the organic material exine of the pollen grain is made up of....

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  3. Differentiate between divergent and convergent evolution. Give one exa...

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  4. Are humming birds and fish regulators or conformers ? Give reasons in ...

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  5. (a) What is green revolution ? Mention the steps that led to it (b) ...

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  6. Expand 'ELISA'. Why is this method preferred over conventional methods...

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  7. State the objective with which a dairy farm is set up .Describe the es...

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  8. Write in what context did Darwin use the terms ' fitness', survival an...

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  9. Name the specific enzyme responsible for nucleotide polymerisation in ...

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  10. Write the causative agent of filariasis in human. Mention its mode of ...

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  11. (a) Name a terminal methode to prevent pregnancy in humans. (b) Desc...

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  12. (a) Do all pollen grains remain viable for the same length of time ? S...

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  13. GM plants are useful in many ways. How would you convince farmers to g...

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  14. Name and explain the technique that helps in the separation of DNA fra...

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  15. When Morgan conducted dihybrid cross on Drosophila like Mendel did wit...

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  16. Name the male accenssory glands in human and write their functions.

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  17. Describe the inter - relationship between productivity , gross primary...

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  18. Explain the process of pollination in Vallisneria. How is it different...

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  19. What is disturbance in Hardy-Weinberg genetic equilibrium indicative o...

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  20. Different animals respond to changes in their surroundings in differen...

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