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Q. What is gastrulation? How during gastrulation are the first two germ layers formed? What are these germ layers?
Gastrulation is the process through which a portion of the blastula wall undergoes invagination inside the blastocele, forming a tube known archenteron (primitive intestine). The cells of the inner side of the tube form the cells of the outer side and the endoderm (germ layer) form the ectoderm (another germ layer). It is the start of the tissue differentiation in embryonic development.
Explain about the DNA viruses - Carcinogenic? The three DNA viruses found to cause human cancers are EBV, HBV and HPV. What are these? Let us find out. Epstein-Barr viru
1. Transcriptional analyses of eukaryotic cells reveal widespread production of RNA. Using specific examples describe how: a) microRNAs are able to influence gene expression.
Explain Development of excretory system? The filtration rate of kidney is low and infants find it difficult to eliminate high concentration of solutes. However, by the end of t
Define Herbals - Old books about Plants? During the Middle Ages, following the decline of the Greek and Roman civilisations, little significant botanical progress was made. The
Are proteins with the same number of each different amino acid that form them necessarily identical proteins? Even if many proteins have the similar number of each dissimilar a
Types of Cleavage a) Radial Type : If each of the blastomeres of upper tier lies exactly over the corresponding blastomeres of the lower tier the pattern of cleavage is radia
How is digestion performed in protozoans? Digestion in protozoans is intracellular digestion: organic material is internalized and degraded inside the cell. Protozoans get
Gluconeogenesis synthesizes glucose from noncarbohydrate precursors, involving pyruvate and lactate, citric acid cycle intermediates, the carbon skeletons of most glycerol and amin
What is the main theory opposed to evolution? The major theory that opposes the evolution theory on the description of how species emerged (phylogenesis) is fixism.
Define Advantages of using Yeast as a source of Protein? 1. Large size, hence separation from the culture medium is easy. 2. As the pH of the growth is towards acidic side,
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