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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.
Explain the Classification of Malignant Tumors Malignant tumors can be classified as: Carcinomas: These tumors arise from the epithelial lining (the squamous cells) e.g. ski
In the fruit fly Drosophila, a rudimentary wing called "vestigial" and dark body color called "ebony" are inherited at independent loci and are recessive to their dominant wild-typ
Floral Apex Each plant must pass through a minimal 'ripeness to flower' stage. That is, even to perceive and respond to a specific photoperiodic regime, a plant must be ready
Explain what is Correction of Hypovolemia ? Intravenous fluids should be given to correct hypovolemia and optimize preload to the heart. This is particularly important in sept
Lactase non-persistence is an example of a genetic trait that has been influenced by cultural factors.Domestication of animals by humans began approximately 10 000 years ago. Farm
Start with a cell with chromosome number 2n=6, and having two acrocentric pairs and one metacentric pair of chromosomes. Draw the cell in metaphase I. Indicate one pair of sister c
Q. How does the circulatory system participate in the functioning of the endocrine system? The circulatory system is basic for the functioning of the endocrine system and the b
A fish of genotype a/a; B/b is crossed to a fish whose genotype is A/a; B/b. What proportion of the progeny will be heterozygous for at least one of the genes? (Assume independent
MUSCLES - In eye orbit, eye ball is fixed by 6 skeletal muscles attached to 3rd, 4th & 6th cranial nerves (motor). 4 - straight or recti muscles are present. 2 - oblique
State the term - Infection Infection is the invasion of the body by disease-producing (pathogenic) microorganisms and the reaction of the tissues to their presence and to the
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