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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.
Tina administered 1 liter of sterile distilled water IV to a patient. Predict the direction (increase, decrease, no change) you would expect Tina's infusion to have produced in the
Spermatogenesis: In the mature male functional sperm cells are produced within the seminiferous tubules of the testes. Around the periphery of the seminiferous tubules are l
Q. List the tissues of pancreas? The pancreas is made up of two types of tissue: The exocrine tissue secretes digestive enzymes. These enzymes are secreted into a network of
Q. Why is cannibalism an inharmonious intraspecific ecological interaction? In the cannibalism an individual eats other of the same species (occurs in some arachnids and insect
Phylum Rhodophyta (Red algae) 1) The photosynthetic pigments include red pigments (phycoerythrin) and blue pigment (phycocyanin) apart from chlorophyll, of which red pigment pr
Define Iron - The Micronutrient Iron, as you may be aware, is a trace element present in the body. The body contains approximately 3 - 3.5 g of iron of which about two thirds i
D uck septicemia (duck pasteurellosis/new duck disease) The disease is caused by Pasteruella anatipestifer (Syn. Riemerella anatipestifer ) that mostly affects growing duck
Programmes directed towards the common crop plants These programmes can be directed towards incorporating the following traits among common crop plants. Non-photo
Define Theory for Check the Presence of Rhodamine B? Addition of artificial colours to pulses, spices and tea is not permitted by PFA act. But certain colours, which contain le
Q. What is the difference between the concepts of epidemic disease and endemic disease? The Endemic diseases are those that often affect people of a given place, many or few in
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