Question

Gynoecium of Poaceae is
A. Bicarpellary syncarpous
B. Tricarpellary syncarpous
C. Monocarpellary
D. Tricarpellary apocarpous

Answer 1

Hint: The Poaceae family of flowers is also known as the gramineae family. It includes all the economically important plants such as cereals like wheat, maize, rice, barley, millet as well as feed for meat producing animals. And even bamboo and grasses.

Complete answer:
1.Plants of the poaceae family are monocotyledonous plants which means they have seed with only one cotyledon in them.
2.Flowers of the Poaceae family are characteristically arranged in the form of spikelets, each having one or more florets.
3.These spikelets are further grouped into panicles or spikes. The part of the spikelet that has the florets on it is called the rachilla.
4.A spikelet consists of two/few bracts at the base, called glumes, followed by one or more florets
5.A floret consists of the flower surrounded by two bracts, one external(the lemma) and one internal (the palea).
6.Female reproductive system of flowers is called Gynoecium. It consists of pistils. It has three parts- Stigma, Style and ovary.
7.In poaceae , its gynoecium consists of one carpel and are called monocarpellary.
8.Gynoecium of poaceae has an ovary which has a basal type of placentation which means the placenta is found at the base of the ovary. It has basal placentation.
9.It has a superior ovary, which means it has a hypogynous flower.And the ovary is unilocular with a single ovule.
10.Gynoecium has short Style, stigma are usually 2 and feathery, papillate or branched.

Hence, the correct answer is option (C)

Note: Agricultural grasses(Poaceae) are grown for their edible seeds are called cereals or grains. Among all crops grown, 70% are mainly grasses. Cereals like —rice, wheat, and maize (corn)—provide more than half of all calories consumed by humans. Cereals are the major source of carbohydrates for humans and even the major source of protein, including rice, maize, and wheat and barley.