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Which one of the following statements is...

Which one of the following statements is not true ?

A

Sporopolenin is contributed by both pollen cytoplasm and tapetum

B

It helps the pollen to withstand againt strong acid

C

Sproropollenin derived from phycobilins

D

It helps pollen during long period preservation in fossil deposits

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  • Let A and B be two symmetric matrices of same order. Then which one of the following statement is not true?

    A
    A + B is a symmetric matrix
    B
    AB is a symmetric matrix
    C
    `AB = (BA)^T`
    D
    `A^T B = AB^T`

  • Two satellites of earth S_(1)andS_(2) are moving in the same orbit. If the mass of S_(1) is four times the mass of S_(2) then which one of the following statements is true?

    A
    The potential energies of earth and satellite in both cases are equal.
    B
    The kinetic energies of two satellites are equal.
    C
    The time period of `S_(1)` is four times the time period of `S_(2)`.
    D
    Satellites `S_(1)andS_(2)` are moving with same speed.

  • Two satellites of earth S_(1)andS_(2) are moving in the same orbit. If the mass of S_(1) is four times the mass of S_(2) then which one of the following statements is true?

    A
    The potential energies of earth and satellite in both cases are equal.
    B
    The kinetic energies of two satellites are equal.
    C
    The time period of `S_(1)` is four times the time period of `S_(2)`.
    D
    Satellites `S_(1)andS_(2)` are moving with same speed.

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