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Explain the endochondral ossification
The second type of osteogenesis is endochondral ossification. This process is different from intramembranous ossification in that it occurs with a cartilage base. Endochondral ossification is responsible for a good deal of formation of the long bones , vertebrae and portion of the mandible. It occurs in the following steps: Embryonic mesenchymal stem cells differentiate into a primitive hyaline cartilage. Blood vessels and bone- forming units, which resorb the cartilage and replace it with osteoid, invade this matrix.
M i croinjection method: In another approach fertilised eggs are microinjected by DNA. Microinjection requires excess of fertilized eggs. Gene transfer by microinjection is
How can asexual reproduction in planarias be described? Planarias can separate themselves asexually by transversal bipartition because of the great regeneration capability of t
What is sodium-potassium pump ATPase? A. There is a net flux of sodium from intracellular spaces into luminal spaces through sodium-potassium pump ATPase spanning proteins l
Xenobiotic compounds are man-made chemicals that are present in the environment at unnaturally high concentrations. The xenobiotic compounds are either not produced naturally, o
Variability refers to the differences in heritable traits exhibited by the individuals of a species. One of the major contributions of Darwin to the study of evolution was his book
How is the blood typing concerning the ABO system and the Rh usually done? In the blood typing for the ABO system and the Rh system a blood sample is collected from the person
What are the five conditons that can cause evolution to take place?
what are the general characters of chordates? At least 10 characters.
Concept behind Freezing the milk Freezing the milk also alters its composition and properties to a great extent. Let us learn about these changes. As the milk freezes, it becom
What is Hyperhomocysteinaemia ? Homocysteine has been considered as a risk factor for Cardio-vascular diseases because of many epidemiological and observational studies showing
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