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...
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Growth and Reproduction in Plants and Animals

Growth and Reproduction in Plants and Animals

Growth and Reproduction Today we are going to discuss another interesting topic and that is growth and reproduction in plants and animals.  We will go through the different influencing factors and internal factors that play a role in growth and reproduction is detail below and we will start with the definition of growth first.... Definition:  Growth is a permanent and irreversible increase in size, form or volume of a living organism and is always attend by an increase in weight.   Method of growth- Growth can be achieve by three principal methods. Increase in number of cells produce through cell division. Proliferation of the intercellular spaces. Increase in volume of cell.   Rate of growth:  When the amount of growth is expressed per unit time is called rate of growth it is generally slower in plant than the animals. If the amount of growth is graphically plotted against time, a sigmoid curve is obtained.  If this growth rate curve is examined three phases are found. Lag period:  At...
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