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Cleavage - Development Biology
Cleavage or segmentation is a series of cell divisions of the fertilized .egg through which it is converted into a multicellular structure, called blastula. The main characteristics of cleavage include:
The cell divisions in the somatic cells are mitotic. The daughter cells or blastomeres or cleavage cells are also derived as a result of mitotic divisions of the zygote. We may ask whether there are any differences between mitotic divisions of somatic cells and, of the zygote and the blastomeres derived from it during cleavage.
Q Do beings of the class Reptilia have indirect or direct development? In beings of the class Reptilia the embryonic development is direct. So there is no larval stage. Q.
At the present level of the biotechnology what are the main techniques of genetic engineering? The main methods of genetic engineering today are: the recombinant DNA technology
what is applied biology
Tectology: This is the study of structural organization of body. Tectology is a term which is used by Alexander Bogdanov to describe a discipline which consisted of unifying all
Tools and Techniques - Effects of Plant Growth Regulators We have discussed about the "effect of auxins". In this section we shall discuss the methodology being followed in h
Types of Variations - Somatogenic and Blastogenic Variation Changes in somatic parts of the body are somatic variations e.g. wrestler's muscle, circumcised penis of mus
Pupillary reflexes There are two types of reflexes which control the pupillary reaction-the light reflex and near reflex. When light is shown on one eye, there is a constrictio
How does the vegetal stratification of an ecosystem influence the biological diversity? The vegetal stratification of an ecosystem, as the strata of the Amazon Rainforest, mak
What are cytokinins? Where are they made? Cytokinins are phytohormones active in the promotion of cellular division; they slow down the aging of tissues and act together with a
In diabetes mellitus counsellor help the diabetic patient to cope up with the stress and take own decision for their treatment and life style changes. Decision making capacity of
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