PLANT EMBRYOLOGY STUDY

PLANT EMBRYOLOG STUDY EMBRYOLOG Early development of Capsella bursa–pastoris Following developmental changes take place in the embryo CopseIla bursa pastoris: I. First division of Oospore: Its oospore increases in size. It divides transversely in two cells. The cell toward the microphyll end is called suspensor cell. The cells towards other side is called embryonal cell. Embryonal cell forms the major ...

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GYMNOSPERMS SHORT QUESTIONS FOR TEST AND PAPER

GYMNOSPERMS SHORT QUESTIONS  FOR TEST AND PAPER YMNOSPERMS SHORT QUESTIONS 1.  Give occurrence of Gymnosperms. Ans: Gymnosperms are naked seeded plants. Gymnosperms are a group of ancient plants. They become dominant in the Jurassic period. Most of the gymnosperms are evergreen trees. Some shrubby plants are also found in this group. They have worldwide distribution. They are most abundant in the temperate ...

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Female Gametophyte or Embryo SAC Development

Female Gametophyte or Embryo SAC Development Female Gametophyte or Embryo SAC Development  Types of embryo Sac Development There we types of embryo sac development. The classification is based on: The number of 9 ses or spore nuclei entering into the formation of embryo sac Thus embryo sac may be monosporic, bisporic or tetrasporic tyr The number, arrangement, and chromosome number ...

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SHORT QUESTIONS OF MORPHOLOGY OF PLANTS FOR TEST AND PAPER

1. Differentiate between tap and adventitious roots. Ans: Tap root arise from the embryo. Adventitious root develops from other mature tissues of plant like stem etc. 2. What are root hairs? Give their functions. Ans: A root hair starts its growth as a small papilla on the outer wall. The nucleus and cytoplasm migrate into the papilla. The papilla grows ...

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GYMNOSPERMS MULTIPLE CHOICE QUESTIONS FOR TEST AND PAPER

MULTIPLE CHOICE QUESTIONS OF GYMNOSPERMS MULTIPLE CHOICE QUESTIONS OF GYMNOSPERMS 1. Which of the followings is correct for vascular bundle of gymnosperms? (a) Stele (b) Exarch (c) Collateral (d) Conjoint 2. Secondary growth occurs by the activity of: (a) Phloem (c) Xylem (c) Cambium (d) Bark 3. Which of the followings is absent in the xylem of gymnosperms? (a) Trachieds ...

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Carrot Family Apiaceae (Umbelliferae)

Diagnostic characters Habits: Annual or perennial herbs rarely shrubs. Roots: Tap root, branched, sometimes, tuberous due to presence of stored food. Stem: Herbaceous stem, erect or prostate with swollen nodes. Leaves: Petiolate, Alternate, simple, exstipulate, reticulate venation. Usually sheathing at the base. Inflorescence: Cymose, umbel (old name of family Umbelliferae derive from umbel), simple or compound. Umbel is surrounded by ...

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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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