Plant Morphology

Plant Morphology

My Dear viewers: In this blog we will discuss about the Plant Morphology in brief   Plant Morphology Plant morphology "represents a study of the development, form, and structure of plants. So in this blog we will discuss the different forms of a plant parts and their functions like Root Stem Bud Leaves Flowers Fruit Seed Pollination Fertilization Germination   ROOT Root:  In vascular plants, the root is the organ of a plant that typically lies below the surface of the soil. Roots can also be aerial, that is growing up above the ground.   There are two types of roots Tap root and Fibrous root   Tap Root The main root that grows almost vertically down into the soil.  It is broad near the base of the stem and tapers towards the tip or apex.  Branches and Sub-branches come out from this main root and get spreaded out in the soil.  Eg.  Sunflower and mustard   Fibrous Root The depthless or adventitious roots.  Eg. Rice Regions of root: 1.  Root cap region Growing region Root hair region ...
Read More
Angiosperm

Angiosperm

Hi viewers Today we are going to discuss about the The Angiosperms. Angiosperms are eukaryotic flower producing fruit producing plants. They may be May be herb, shrub and tree or may be annual, biennial and perennial type PROPERTIES ANGIOSPERM They are eukaryotic in nature They are autotropic Roots,stem and leaf are distinct Xylem and phloem are present Seeds are covered with fruits Fertilisation takes place after few days of pollination Leaves are of various types Flowers are of various types Mango,Coconut, etc. 1.   State five distinctive features of angiospermic plants. (3) Ans. i) Presence of flowers. ii) Formation of fruit. iii) Pollen grains are borne in anther. iv) Existence of double fertilization. v) Formation of triploid endosperm after fertilization. 2.  What are angiosperm and phanerogam? (1+1) Ans. a) The angiosperms are the highest evolved vascular plant producing flowers and fruits. b) All flowering plants are called phanerogams. 3.   Name three structures absent in dicot seed. (1) Ans. Coleoptile, coleorhiza and scutellum 4.  Name a nonendospermic monocot plant. (2) Ans. Arum 5. Name the fruit where fruit coat and seed coat...
Read More
The Gymnosperm

The Gymnosperm

Hi viewers Today we will discuss about the Gymnosperm. Basically, Gymnosperms are eukaryotic plants, which have naked seed and fertilization takes place after one year of fertilization. PROPERTIES GYMNOSPERM They are eukaryotic in nature They are autotrophic Roots,stem and leaf are distinct Woody stem and xylem are present Naked seeds are present Spiny leaves are present Fertilisation takes place after one year of pollination Male cone and female cone are present They are evergreen and perennial Eg. Pinus and Cycas, etc. 1.  Name one gymnosperm where xylem vessels and companion cells are present. (1) Ans. Gnetum 2.  Differentiate between bract scale and ovuliferous scale. (2) Bract scale Ovuliferous scale 1. They are located at the base of the microsporophyll. 2. They have a membranous structure. 3. They protect the base of the megasporophyll and provide their attachment with the axis. 1. They are the upper lateral projections of the megasporophyll. 2. They have a more woody structure. 3. They provide support and protection to the ovules. Differentiate between endosperm of gymnosperm and endosperm of...
Read More
The Pterydophyta

The Pterydophyta

Hi viewers Today we will discuss about the world of Pterydophyta Definition of Pterydophyta Pteridophytes are vascular plants that reproduce and disperse via spores, these plants produce neither flowers nor seeds and it also show alternation of generation. PROPERTIES PTERYDOPHYTA Autophytic nutrition. Terrestrial Body is divisible into root, stem and leaf They are nonflowering plants Reserve food material is starch Cell wall- cellulose Sporophytes and Gametophytes are separate plants Adult life starts with sprophyte Chemotropism- occurs by synthesis of malic acid Vascular tissue is present Eg. Any kind of fern 1.  What are the main characters of Pteridophytes? (3) Ans. The main characters of Pteridophytes are in the following: a) Pteridophytic plants are advanced than the bryophytes but less advanced than gymnosperms, and mostly they are terrestrial. b) They are non-flowering plants, and do not bear flowers, fruits and seeds. c) The leaves are generally of two types- small and scale like microphyllous and large megaphyllous. d) The plant body is the sporophyte, which is well developed, autotrophic and long lived....
Read More
The Bryophyta

The Bryophyta

Hi viewers Today we will discuss about the world of Bryophyta Definition of Bryophyta A division of nonflowering plants characterized by rhizoids rather than true roots and having little or no organized vascular tissue and showing alternation of generations between gamete-bearing forms and spore-bearing forms; comprises true mosses (Bryopsida) and liverworts (Hepaticopsida) and hornworts (Anthoceropsida) PROPERTIES BRYOPHYTA Autophytic nutrition. Terrestrial Aphibians among the Plant Kingdom because it needs water during the reproduction Thallus body Reserve food material is starch Cell wall- cellulose Sporophyte depends upon the gametophyte Adult life starts with gametophyte Chemotropism- occurs by synthesis of sucrose Vascular tissue is absent Eg. Any kind of moss Q and A on Bryophyta What are the main characters of Bryophyta? (3) Ans. The main characters of Bryophyta: a) Bryophyta is a kind of non-flowering, autophytic independent plant. b) The gametophytic plant body of the lower Bryophytes are not differentiated into root, stem and leaves, Eg.- Riccia. They are thallus like. c) Conducting tissue systems (xylem and phloem) are absent. It...
Read More
The Fungi

The Fungi

Hi viewers: Today we will discuss about the world of Fungi. Definition of Fungi A kingdom of eukaryotic, spore forming and saprophytic organisms that grow in irregular masses, without roots, stems, or leaves, and are devoid of chlorophyll or other pigments capable of photosynthesis. E ach organism (thallus) is unicellular to filamentous, and possesses branched somatic structures (hyphae) surrounded by cell walls containing chitin and containing true nuclei. PROPERTIES FUNGI Heterotrophic nutrition (parasitic or saprophytic)       Terrestrial Thallus body Reserve food material is glycogen Cell wall- chitin Pseudoparenchyma Nonflowering Microscopic or macroscopic Reproduction- vegetative, asexual and sexual Eg. Yeast, Mucor, etc a.  Mushroom b.  Sporangium of Mucor Classify fungi up to subdivisions and mention characteristic features of each subdivision. (6) Ans. Main classification of fungi: Fungi are classified into four classes such as: 1. Phycomycetes eg. Mucor, 2. Ascomycetes eg. Yeast (Saccharomyces), 3. Basidiomycetes, eg. Agaricus, and 4. Deuteromycetes eg. Fusarium. Class 1. Phycomycetes: The hyphae of the fungi of this class are aseptate. They are coenocytic in nature eg. Mucor. Class 2....
Read More
The Algae

The Algae

Hi viewers: Today we will discuss about the algae, which are Eukaryotic plants, my be microscopic single cellular or macroscopic multicellular.  These are grouped under plants kingdom PROPERTIES ALGAE  Autophytic nutrition. Exception- Cephaleuros (a parasitic algae) Fresh water or marine Thallus body Reserve food material is starch Cell wall- cellulose True parenchymatous cells are present Nonflowering Microscopic or macroscopic Reproduction- vegetative, asexual and sexual Eg. Spirogyra, Volvox, Chlamydomonas, Chara etc   a.  Chlamydomonas b.  Spirogyra c.  Volvox Q and A of Algae Distinguish between coenocyte and coenobium. (1) Coenocyte Coenobium 1. A mass of cytoplasm surrounding many nuclei and enclosed by a cell wall. It is found in certain algae and fungi. 1. A colony of Volvox is called coenobium. Mention few characteristics of (unicellular) Chlamydomonas. Ans. a. Chlamydomonas is a unicellular motile green alga possessing two flagella and usually a cup shaped chloroplast. b. Cell wall is thin and composed of cellulose. c. The basal granules situated at the base of the flagella are called blepharoplasts. d. At the base of each flagella lies one contractile vacuole,...
Read More
12