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What is locus?...

What is locus?

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What is the locus of the equations x^2+y^2+z^2=0 ?

Show that the locus of the point of intersection of mutually perpendicular tangetns to a parabola is its directrix.

Prove that the locus of a point that is equidistant from both axis is y=x.

Prove that the locus of the centroid of the triangle whose vertices are (acost ,asint),(bsint ,-bcost) and (1,0) , where t is a parameter, is circle.

Having given the bases and the sum of the areas of a number of triangles which have a common vertex, show that the locus of the vertex is a straight line.

If on a given base B C , a triangle is described such that the sum of the tangents of the base angles is m , then prove that the locus of the opposite vertex A is a parabola.

If the sum of the distances of a variable point from two perpendicular lines in a plane is 1, then its locus is :

Show that the locus of the middle points of chord of an ellipse which paas through a fixed point, is another ellipse

Show that the locus of the point, the powers of which with respect to two given circles are equal, is a staight line.

Show that the locus of a point that divides a chord of slope 2 of the parabola y^2= 4x internally in the ratio 1 : 2 is a parabola. Find the vertex of this parabola.

MBD-HEREDITY AND EVOLUTION-EXAMPLE
  1. Name the gases used by urey and miller for their experimnt

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  2. What is biogenesis?

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  3. What is locus?

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  4. In the diagram what is the sex of (a) and (b)

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  5. Branch of biology deals with heredity and variation is called

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  6. The factors which represent the contrasting pairs of characters are ca...

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  7. Two allelic genes are located on

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  8. Mendel's law of segregation is based on separation of alleles during

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  9. The phenotypic ratio in the F2 generation of a dihybrid cross is :

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  10. How many pairs of chromo-somes are present in male/fKHOale human?

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  11. Who postulated the natural selection as the basis of evolution?

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  12. How many pairs of chromo-somes are present in male/fKHOale human?

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  13. How many years bach human has started to grow the wild cabbage as food...

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  14. How the age of fossils is determined

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  15. Fill in the blanks: ……are units of heredity

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  16. Fill in the blanks: There are…..pairs of chromosomes in human.

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  17. Fill in the blanks: Site of gene on a chromosome is called………. .

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  18. Fill in the blanks: Continuity of life is maintained through…….and…… ...

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  19. Fill in the blanks: Mendel formulated law of purety of gametes on the...

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  20. Fill in the blanks: The composition of fKHOlae sex-chromosomes is…....

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