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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.
The cyclic exchange of nutrient material between organisms and non-living environment is called biogeochemical cycle ,'geo means earth: ''chemical' means chemical elements, thus
What is the difference between bryophytes and tracheophytes? Bryophytes are nonvascular plants (mosses, hornworts, liverworts), i.e., they do not have a conductive system for t
true or false. the law of entropy says that all energy is ultimately derived from the sun
Q. How is the nervous tissue distributed in cnidarians? Their nervous system is diffuse there are no ganglia or brain. Q. What are the kinds of reproduction presented by cn
Q. Define the Remodeling rate? Human cortical bone: 2-10% per year depending on site and age of patient. Trabecular bone: Higher turnover rate 20-30% per year. In a stu
Explain the salient features biochemical origin of life.
Q. Omega-3 Essential Fatty Acids? Omega-3 essential fatty acids found in flax and cold-water fish help fight inflammation. For a condition such as diverticulitis, it may be wis
This method makes use of a common, but peculiar, group of DNA sequences known as minisatellites. High levels of variation in the numbers of these repeated units are used in "DNA fi
Q. Which arthropod class is the mainly diversified animal group of the planet? How can this evolutionary success be explained? The insects are the animal group with most divers
How are the fruits formed? The fecundation is in angiosperms triggers the release of hormones that act upon the ovaries. The ovary wall after that it develops into a fruit that
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