Question

The typical floral formula of Gramineae is
(a) $Br\mathrm{\%}⚥P_2{A}_3{G}_1$
(b) $Br\oplus ⚥P_2{A}_3{G}_2$
(c) $Br\oplus ⚥P_2{A}_2{G}_{(3)}$
(d) $Br\oplus ⚥P_2{A}_3{G}_3$

Answer 1

Hint: Gramineae is a family of monocotyledonous flowering plants. Graminacea or Poaceae are the most important commercial family of plants. They provide staple food as well as grazing feed for livestock. Their leaves have parallel venation. They were named by John Hendley Barnhart in 1895. The term poaceae is derived from the greek word Poa meaning fodder.
Examples: Bamboo, grasses, cereal grasses

Complete answer:
The typical floral formula of Gramineae is $Br\mathrm{\%}⚥P_2{A}_3{G}_1$
The flower of Graminacea have the following characteristics:
-Bisexual
-Hypogynous
-Zygomorphic
-Sessile
-Bracteate
The flower consists of three stamens, two perianths and a monocarpellary gynoecium. The gynoecium has a single ovule on basal placentation. It has a short style and a superior ovary.
Floral formula is employed to show the formation of a flower with the help of various characters like numbers and letters. A floral formula can represent a particular species or an entire taxa.

Note:
Graminacea may be perennial or annual herbs. They have cylindrical and hollow stems called culms.
Gramineae or Poaceae have various uses. They are:
Food: Cereals or grains are part of Poaceae. $70\mathrm{\%}$ of all grown crops are grasses. Rice, wheat and maize provide almost $50\mathrm{\%}$ of the calories consumed by man.
Industry: They are used as raw materials for the construction and composition of building materials. They are also used for making paper and biofuel.
Lawn and ornamental use: They are used on lawns as the surface and help prevent erosion on sloping areas.