Question

How many of the following features for a monocot plant?

(i) It is a flowering plant.

(ii) It has one cotyledon and the flower has trimerous symmetry.

(iii) It has reticulate venation in leaves.

(iv) It has two cotyledons and the flower has pentamerous symmetry.

(v) Its stem is hollow.

(vi) It has tap root system.​

Answer 1

Answer:

1 ,2 ,5

Explanation:

these are the character of monocot plant rest all are of dicot plant . However some herbaceous dicot plant also has hollow stem

Answer 2

Explanation:

Biology Dictionary

Monocot

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By:

BD Editors

Reviewed by: BD Editors

Last Updated: May 26, 2017

Monocotyledon Definition

Monocotyledon, or monocot for short, refers to one of two groups of flowering plants, or “angiosperms.” Most flowering plants are traditionally divided into two different categories: monocots and dicots. Members of each group tend to share similar features.

Monocots, as the name implies, are defined by having seeds that contain a single (mono-) embryonic leaf known as a cotyledon. This is a monophyletic group that constitutes a majority of our agricultural biomass and include many important crop staples including, but not limited to, rice, wheat, corn, sugar cane, bamboo, onion, and garlic.

A word of caution: when classifying flowers into monocots or dicots, remember that there are always exceptions to the rule. Some monocots may have a feature typically found in dicots, or vice versa. Even a few flowering plants (approximately 2%) don’t fit into either the monocot or the dicot category.

Features used to Distinguish Monocots from Dicots

Monocots differ from dicots in six distinct structural features. Five of these features are easily observed in the mature angiosperm: the flowers, leaves, roots, stems, and pollen grains. But the root of these differences stem from the very early embryonic stages of the angiosperm, providing the biggest difference of all between monocots and dicots, is the seed.

Flowers

Flowers usually arrange their parts in circles, with the reproductive parts in the middle surrounded by petals and sepals. In monocots, these flower parts are trimerous. In other words, the flower parts of a monocot are arranged, structured, or numbered in multiples of three—usually with one stigma, three stamens, three petals, and a calyx formed by the sepals in numbers less than or equal to the number of petals.

Leaf Veination

Veination refers to the pattern of veins in a leaf blade. These veins are responsible for the transport of water and carbohydrates throughout the plant. In monocots, these veins are arranged in a parallel-like pattern. Compared to other patterns of veination, in parallel veination, the parallel veins are smaller in size with even smaller veins connecting them.

Roots

While monocots start of with a tap root, these tap roots tend to die soon after germination and are replaced by adventitious roots. Adventitious roots look fibrous and are spread widely throughout the soil in many different directions. They tend to occupy the upper layer of soil and can be modified for different purposes like additional anchorage or aerial support. Because adventitious roots typically arise from an organ that is not the root of a plant, such as the stem or sometimes a leaf, we are able to grow multiple plants from stem or leaf cuttings of a pre-existing plant!

Stems

It is important to note that the stems of monocots have lost the ability to increase their diameter by producing wood and bark through secondary growth. Instead, monocot stems die down each year, allowing new stems to grow. The only growing point of a monocot stem is at the top of the stem, disallowing the growth of any side stems or branches. Typically, then, monocotyledons are small and herbaceous

In a cross section of a monocot stem, you will find an epidermis, hypodermis, ground tissues, and vascular bundles. Typically, monocot stems have the following characteristics: single layer epidermis with a thick cuticle; lack of epidermal hairs; lack of concentric arrangement; hypodermis is sclerenchymatous; presence of bundle sheaths; oval vascular bundles of different sizes; and most notably, scattered vascular bundles that do not have create any pattern.

Pollen Grains

Monocots have a pollen structure that is retained from the first angiosperms. The pollen grain of a monocot is monosulcate, meaning that the pollen has a single furrow or pore through the outer layer.

Embryos

The plant embryo is the part of the seed that contains all of the precursor tissues of the plant and one or more cotyledon. As the name suggests, monocots are characterized by having one (mono-) cotyledon in the seed, and one leaf emerging from the cotyledon. The seed pod of a monocot is also trimerous (in parts of three), because the carpel from which they grew also consisted of three parts.

The cotyledon is the first part of the plant to emerge from the seed, and is the actual basis for distinguishing the two main groups of angiosperms. Cotyledons are important in food absorption and are responsible for absorbing nutrients from the environment until the plant can photosynthesize its own nutrients.

Examples of Monocots

Grasses, Palm Trees,Lillies,Orchids,Bananas