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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.
What is Stem cell therapy Most defects / diseases treated by stem cell therapy are not genetic in origin so the therapy will have no impact on gene pool in terms of change in f
How many cellular nuclei does the pollen tube of angiosperms have? What is the ploidy of each of these nuclei? The pollen tube that is the mature male gametophyte of angiosperm
Primary effects 1. Nuclear contamination 2. Biological contamination 3. Chemical contamination 4. Destruction of infrastructure facilities. 5.
Microbodies Peroxisomes and glyoxysomes are microbodies formed from ER which superficially resemble the lysosomes. Peroxisomes are spherical bodies limited by a single membrane
Plant Responses to Light-Dark Cycles Based on their requirement for day length (number of hours of light) for flowering plants have been grouped under three major categories,
1.How does the skin on your palm differ from that on the back (posterior) of your hand? 2.Describe the differences observed in the type and distribution of hair on the front (anter
Q. Explain Continuous full - thickness incision? Continuous full - thickness incisions are indicated for a variety of situations outlined below. This type of incision may be us
What is the difference between self pollination and cross pollination? Which of these two modes of pollination contributes more to the plant diversity? Self pollination happens
What is ISQ In resonance frequency analysis implant stability quotient (ISQ) is use to quantify the frequency measurement of implants within a range between 3500 and 8500 HZ. I
What are the four groups of protozoans? The four major groups of protozoans are the sarcodines (that form pseudopods, like amoebae), the mastigophores (flagellated, such as the
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