Structure Of Flower Test

Structure Of Flower

This is online test 02 for CBSE class 12 Biology Sexual Reproduction in Flowering Plants (Structure of flower).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
Outermost green leafy whorls of flower is called
  • A
    Sepals
    Correct
  • B
    Petals
  • C
    Tepals
  • D
    Stamen
2
Pollen grains are formed inside the
  • A
    Ovary
  • B
    petals
  • C
    Anther
    Correct
  • D
    Stigma
3
Monoecious flowers contain
  • A
    Only male reproductive parts
  • B
    Either male or female reproductive parts
  • C
    Both male and female reproductive parts
    Correct
  • D
    Only female reproductive parts
4
Flower is a modified shoot because
  • A
    Floral organs are arranged in whorls.
  • B
    Growth is unlimited
  • C
    Flower develop in the axils of bracts like axillary shoots
    Correct
  • D
    Growth is limited
5
When there is no distinction of sepals and petals, the non-essential floral organs are collectively called
  • A
    Sepaloid
  • B
    Petaloid
  • C
    Imbricate
  • D
    Perianth
    Correct
6
The free occurring unit of gynoecium is called pistil. Each pistil consists of three parts called
  • A
    Stigma, anther and filament
  • B
    Ovary, style and stigma
    Correct
  • C
    Ovary, style and anther
  • D
    Ovary, filament and stigma
7
The thalamus is convex or conical; ovary develops at its tops while stamens, petals and sepals are borne successively below. This kind of floral arrangement is called
  • A
    Perigamous and ovary inferior
  • B
    Hypogamous and ovary superior
    Correct
  • C
    Perigamous and ovary superior
  • D
    Hypogamous and ovary inferior
8
Activation is the
  • A
    Arrangement of flowers on the axis.
  • B
    Arrangement of leaves at node
  • C
    Arrangement of accessary floral organs in relation to one another in bud condition.
    Correct
  • D
    Distribution of ovule inside the ovary
9
Actinomorphic flowers has a. Radial symmetry b. Often irregular c. Two equal halves are produced only by one vertical division.
  • A
    Only b and c are correct
  • B
    All are correct
  • C
    Only a is correct.
    Correct
  • D
    Both a and b are correct
10
Assertion: In epigynous flowers, other floral organs are borne above the level of ovary. Reason: The ovary is inferior while other floral parts are superior.
  • A
    Assertion is incorrect but reason is correct.
  • B
    Assertion is correct but reason is incorrect.
  • C
    Reason does not explain the assertion completely.
  • D
    Both assertion and reason are correct.
    Correct