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Galvanotaxis - Modes of Cell Movement
Galvanotaxis considers to the movement of cells in response to a potential variation between cells. It is suggested that there are voltage differences among embryonic regions that could play an important role in morphogenesis. Minute electric fields of the order of 10 to 100 mv/mm appear to be enough to alter the direction of nerve growth. Nuccitelli and Erickson (1984) displayed that embryonic chick fibroblasts migrate toward negative pole when cultured in small steady electrical field. Early chick embryos, regenerating blastema of amphibians and moth ovaries while transportation of yolk proteins occurs, arc some of the structures where large electric currents have been detected.
Gonial Apospory and Somatic Apospory Gonial Apospory There is no meiosis. The megaspore mother cell enlarges; a small vacuole appears above and below the nucleus. The c
Explain the Dark Adaptation of Vitamin A? In the early stages of VAD, the individual cannot see objects in dim light. This' phenomenon is used as a criterion for assessment in
In almost all animal groups, the mode of speciation is geographic speciation. It is essential that a population which is a prospective new species is geographically isolated from t
Describe pulsus parvus et tardus? Pulsus parvus et tardus means a slow rising small volume pulse typically in severe aortic stenosis with preserved LV function. Figur
Which of the following BEST characterizes gas exchange in animal versus plant metabolism: Animals take in O2 and release CO2. Plants take in and release both O2 and CO2. Both anima
FUNDAMENTAL CHARACTERS OF EMBRYONIC DEVELOPMENT 1 . GAMETOGENESIS- Testes & ovaries are collectively called as gonads. Similarly sperms & ova are collectively calle
What is cloning? The Cloning is the making of an organism genetically identical to another by means of genetic engineering. The foundation of cloning is the nucleus transpla
Photometer Photometer (Figure shown below) measures the intensity of light. The metallic plate A is a photocell which emits electrons from its surface when light of sufficient
What is Dyslipidaemia ? The results of epidemiological studies, as well as trials with angiographic or clinical endpoints, confirm the importance of various lipid fractions in
Water is considered a universal solvent because- Select one: a. it can dissolve polar and non-polar compounds b. it can dissolve both positively and negatively charged ion
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