Biology Today - February 2018

Androecium Ten, usually diadelphous

[(9) + 1], anthers

dithecous, introrse

dehiscence longitudinal

Stamens five, epipetalous,

filaments free, anthers

bithecous, basifixed or

dorsifixed, introrse, longitudinal

or porous dehiscence

Stamens six (3 + 3), free or monadelphous

(H.J., 5XVFXV), epiphyllous, basifixed,

dorsifixed, or versatile anther, longitudinal

dehiscence

Gynoecium Ovary superior,

monocarpellary, unilocular

with many ovules,

marginal placentation

Bicarpellary, syncarpous, ovary

superior, bilocular, sometimes

tetralocular due to false septum,

placenta swollen with many

ovules, axile placentation, ovary

is obliquely placed

Tricarpellary, syncarpous, superior ovary,

trilocular with 2 to many ovules, axile

placentation, rarely parietal, styles united

or separate, stigma free or fused, trilobed

Fruit Legume rarely lomentum Berry or capsule Capsule, rarely berry

Seeds One to many,

non-endospermic

Many, endospermic Endospermic

Floral formula % + K(5) C1+2+(2) A1+(9)G (^1) +K(5) C(5) A 5 G(2) +P3+3 or (3+3) A3+3 G(3)
Floral diagram

1. 3HWXQLD has 5 sepals, 5 petals, 5 stamens and 2 carpels. It
   is a type of
   (a) pentamerous flower (b) isomerous flower
   (c) heteromerous flower (d) bimerous flower.


2. When sepals are fused together to form calyx, it is termed as
   (a) gamosepalous (b) gamopetalous
   (c) polysepalous (d) spurred.


3. Vexillum is found in Family
   (a) Caryophyllaceae (b) Papilionaceae
   (c) Rosaceae (d) Brassicaceae.


4. Read the given statements and select the correct ones.
   (i) The flower of %UDVVLFD is zygomorphic.
   (ii) The flower of 'DWXUD is actinomorphic.
   (iii) A flower which cannot be divided into two equal
   parts by vertical plane is called asymmetric flower.
   (iv) Actinomorphic flowers do not have radial symmetry.
   (a) (i) and (ii) (b) (iii) and (iv)
   (c) (ii) and (iii) (d) All of these


5. Select the option that correctly fills the given blanks.
   (i) In _ anther, filament joins the anther at its base.
   (ii) In __ anther, filament is firmly fixed to the back
   of the anther.

(iii) In ______ anther, filament is attached to the back

of the anther and it can swim freely.

(iv) In ______ anther, filament runs throughout the

length of the anther or become continuous with the

connective.

(i) (ii) (iii) (iv)

(a) basifixed dorsifixed versatile adnate

(b) basifixed adnate versatile dorsifixed

(c) adnate basifixed dorsifixed versatile

(d) adnate dorsifixed versatile basifixed

6. Identify A, B, C and D (aestivations) from the given figure
   and choose the correct option.

ABC D

(a) A-%UDVVLFD, B-China rose, C-&DVVLD, D-Pea

(b) A-China rose, B-%UDVVLFD C-&DVVLD, D-Pea

(c) A-Pea, B-%UDVVLFD C-China rose, D-&DVVLD

(d) A-%UDVVLFD B-&DVVLD, C-China rose, D-Pea