Science > Biology > Zoology > Criteria for Animal Classification In this article, we shall study the criteria for animal classification. Animals are classified as follows: On the Basis of Number of Germ Layers: Animals in which the cells are arranged in two embryonic layers, an external ectoderm, and an internal endoderm, are called diploblastic […]
Science > Biology > Botany > Reproduction in Plants > Types of Endosperm and Fruit Formation In the last article, we have studied fertilization and the formation of the endosperm. In this article, we shall study types of the endosperm. Types of endosperm Nuclear Endosperm: The primary endosperm nucleus divides repeatedly to form a large […]
Science > Biology > Botany > Reproduction in Plants > Fertilization In last article, we have studied about pollination and its types. In this article, we shall study the process of fertilization. Out Breeding Devices: Most angiosperms produce bisexual flowers (hermaphrodite). But most of them avoid self-pollination naturally or we can say that in plants […]
Science > Biology > Botany > Reproduction in Plants > Pollination and its Types In this article, we are going to study important step in sexual reproduction in plants i.e. pollination. We shall also study its types. Transfer of pollen grains (shed from the anther) to the stigma of a pistil is termed pollination. Depending […]
Science > Biology > Botany > Reproduction in Plants > Androecium and Gynoecium The flower is the reproductive unit in the angiosperms. It is meant for sexual reproduction. A typical flower has four different kinds of whorls arranged successively on the stalk or pedicel, called thalamus or receptacle. These whorls are calyx, corolla, androecium and […]
Science > Biology > Botany > Reproduction in Plants > Sexual Reproduction in Plants Sexual reproduction is also called amphimixis (Gk. amphi – both, mixis – union) or syngenesis (Gk. syn – together, genesis – origin) or amphigony (Gk. amphi – both, gony – marriage). In this article, we shall study sexual reproduction in plants. […]
Science > Biology > Botany > Reproduction in Plants > Asexual Reproduction in Plants In this article, we shall study asexual reproduction in plants. Reproduction: Reproduction is defined as a biological process in which an organism gives rise to young ones (offspring) similar to itself. The offspring grow, mature and in turn produce new offspring. […]
Science > Biology > Botoany > Physiology > Transport in Plants Transportation is a process in which a substance either synthesized or absorbed in one part of the body reaches another. In living things, many substances such as food, gases, minerals salts, hormones, and waste products have to be transported from one part of the […]
Science > Chemistry > Introduction to Chemistry > Naming of Chemical Compounds In this article, we shall study the method of naming of chemical compounds In a chemical reaction, the molecular composition changes and it is represented by a chemical equation. In a chemical equation, the various substances involved as reactants or products are written […]
There are many observable patterns in the physical and chemical properties of elements as we descend in a group or move across a period in the Periodic Table. The term periodicity is used to indicate that some characteristic properties occur in the periodic table after definite intervals, with a varying (gradual increase or decrease) magnitude. The periodic recurrence of elements having similar […]