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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.
If experiments do not support the hypothesis, the hypothesis is always rejected or wrong. True or False?
The genotype of a plant showing the dominant phenotype can be determined by : 1. Test cross 2. Dihybrid cross 3. Pedigree analysis 4. Back cross It is determined
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Which of the following occur in response to an increase in the length of the right knee extensors in response to a quick tap applied to the right patellar tendon? An increase in t
HEROI N (DIACETYLMORPHINE OR DIAMORPHINE) - Heroin is a white, crystalline semi synthetic compound prepared from morphine by acetylation. Most dangerous opiate. It i
A wire 50.0 m long and 2.00 mm in diameter is connected to a source with a potential difference of 9.11 V, and the current is found to be 33.7 A. Assume a temperature of 20°C and,
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Rheumatic heart disease was the predisposing cardiac lesion for IE in 20 to 25 per cent. In patients with rheumatic heart disease, endocarditis occurs most frequently on the mitral
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