zone of cellular division

In this type every nuclear division is followed by cytokinesis, making it cellular from the beginning it sel..

Growth at the cellular level involves four stages Cell expansion: an increase in the size of the cell due to formation of new protoplasm. Cell division: the cells increase in number due to mitotic cell division Cell differentiation: the cells became specialized to per form ..

>DNA molecule is composed of two polynucleotide chains that are coiled around each other. Each chain has nucleotides of adenine, guanine, cytosine and thymine. The structural details of the DNA molecule are very well explained by the double helix model proposed by Watson and Crick. The most signifi..

This is an intermediate type of endosperm formation between the nuclear and cellular types. In this, the first division is accompanied by wall formation but the subsequent divisions are nuclea..

After fertilization, the zygote undergoes a number of mitotic divisions and form a multicellular embryo. The primary endosperm nucleus also passes through a series of mitotic divisions and form a mass of endosperm cells which provide nourishment to the developing embryo. Based o..

In multi cellular organisms, growth occurs by an increase in the number of cells of the organism. The increase in the number of cells is due to mitotic cell division. In this type of growth, the average cell size remains the same, or increases insignificantly. Example: Growth of..

Post Fertilisation Changes - After fertilization, the zygote undergoes a number of mitotic divisions and form a multicellular embryo. The primary endosperm nucleus also passes through a series of mitotic divisions and form a mass of endosperm cells which provide nourishment to t..

It is the process of division of the cytoplasm to result in the formation of daughter cells. fig. 17.1 - The Cell Cycle Phase Events within cell G 1 Intensive cellular synthesis, mitochondria, chloroplasts (in plants), ER, lysosomes, golgi complex, vacuo..

Topography includes the physical features of the earth like altitude, slope, exposure, mountain chains, valleys, plains, etc...

In this technique an animal tissue is broken into separate cells by mechanical agitation or by immersing in a mixture of (a) proteases, such as trypsin and collaginase, and (b) calcium-binding agents. The proteases break down the extra cellular materials that bind the cells together. The ..