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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.
Define Determinants of Food Security - Vulnerability? It is the fourth critical variable and defines the risk factor to which a person, family, community or nation is exposed o
RESPIR A TIO N IN FISHES - Respiratory organs are gills. In elasmobranchi 5-7 pairs of gills present, spiracles present. In Teleostomai 4 pairs gills present, covered
Consider 100 ml of 10% solute and 10 ml of 50& solute. Which has the greatest concentration of solute? What is the concentration of solute? Which has a greater quantity of solute?
Electro magnetic radiation Light is one form of energy. The light rays consist of tiny particles called photons. The energy carried by photon is called quantum. Light
Some of the characteristics of Bt cotton are: 1. Long fibre and resistance to aphids 2. Medium yield, long fibre and resistance to beetle pests 3. High yield and produ
What event marks the beginning of the menstrual cycle? What is the blood concentration of FSH, LH, estrogen and progesterone in this phase of the cycle? By convention the menst
DNA replication in eukaryotes is much more complex than in prokaryotes while there are various same aspects. The Eukaryotic cells can only initiate DNA replication at a particular
Give an introduction for optical defects, of eye for an assignment?
Explain the Indications for neuropsychological screening Nature of referral question warrants it. Situational explanation for changes in emotions or cognitive functioni
Development of Heart in Amphibians The heart and the surrounding pericardial cavity build up from lateral mesoderm. After gastrulation, the mesodermal mantles carry on to gro
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