Morphology of Plants – The Stem

The Stem The main stem is the portion of the primary axis of the plant which develops from the plumule axis. An axis, together with the leaves which it bears, is called a shoot. A branch is also a shoot, for it consists of an elongation axis or stem with its own set of leaves. Characteristics of Stem The stem ...

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Morphology Of Plants – The Roots

The Roots The root may be defined as the cylindrical plant organ which is devoid of chlorophyll, bearing no buds or leaves, and tending to grow downwards away from light. It is covered at its tip by the root-cap it bears fine, delicate hairs, the root-hairs which absorb water from the soil.  Types of Roots Roots may be classified into two ...

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Binomial Nomenclature Of Plants

Binomial Nomenclature  Plant Nomenclature: The assignment of scientific names to plants is called Nomenclature. Name is one of the most important ways of identifying an object. Names maybe common, proper, abstract or collective. Our choice of names for individuals is generally arbitrary, however, it imbibes a great influence of language, religion, culture and tradition. Since due to wide application and ...

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Botanical Plants Classification (Part 2)

Botanical Plants Classification (Part 2) Division: Gymnospermae The division Gymnospermae was placed in between dicotyledons and monocotyledons and is further classified into three orders. Gnetaceae Coniferae Cycadaceae This system has some refinements over that of de Condolle’s namely erection of a new series Disciflorae in their Polypetalae and its incorporation between the Thalamiflorae and Calciflorae, and revision of apetalous taxa. The gymnosperms were treated as the third taxon, ...

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Characteristics Of Natural Wood

        Characteristics Of Natural  Wood Wood is a I–41 fibrous tissue found in many plants. It has been used for centuries ice noth fuel and as a construction material. It is composed of 2 natural composite of cellulose fibers (which are strong in tensio .) embedded in a matrix of lignin. Lignin resists compression. W md is ...

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Botanical Plants Classification (Part 1)

Botanical Plants Classification (Part 1) Classification           Classification is the arrangement of plants into groups having common characteristics. These groups are arranged into a system. Similarly, species of flowering plants are placed in a Genus; similar genera are grouped into Families; families with common features are arranged into Orders; orders into Classes and classes into Divisions. The Aim of Botanical ...

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Nature of the Endosperm in Angiosperms

Nature of the Endosperm in Angiosperms   Nature of the Endosperm in Angiosperms Nemec (1910), brink and Copper (1947), suggested that fusion of second male gamete with the polar nuclei serve two functions: It stimulates the development of endosperm. It helps in the formation of the tissue which is physiologically more suitable for the nourishment of the embryo. Thus, it ...

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Development of Monocot Embryo of Angiosperms

Development of Monocot Embryo of Angiosperms (Sagittaris sagittifolis) Development of Monocot Embryo The oospore divides to form a Proembryo which is a filament consisting of three cells, a large Basal Cell, a Middle Cell and a Terminal Cell. The basal cell is present towards micropylar end. It enlarges in size forming most of the suspensor. The middle cell divides repeatedly ...

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Fertilization In Angiosperms

Fertilization In Angiosperms Fertilization The pollen tube after entering the embryo sac bursts and during this process one of the synergids is also destroyed. The tube nucleus disintegrates. One of the male gametes move towards the egg and fuses with it (syngamy) and the other male gamete fuses with the secondary nucleus (triple fusion). This process is known as Double ...

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Types Of Embryo Sacs Of Angiosperms

Types Of Embryo Sacs Angiosperms Types of Embryo Sacs The previously mentioned development of female gametophyte is that of a Normal Type 8 -nucleate monosporic embryo sac. However, there are several variations from this normal type and the embryo sacs are divided into categories on the basis of these variations. Monosporic Type The embryo sac of this type may be ...

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