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In the experiments that led Fredrick Griffith to discover the "Transforming Principle", which of the following was the key step in illustrating that a substance within one cell could transform another cell?
A. Live strains of pathogenic and non-pathogenic bacteria were independently injected into mice.
B. Heat killed and fragmented pathogenic bacteria cells were injected into mice.
C. Heat killed and fragmented pathogenic bacteria cells were mixed with living non-pathogenic bacterial cells and then injected into mice.
D. Live strains of pathogenic and non-pathogenic bacteria were varied together and injected into mice.
Embryo - Pollen Biology The suspensor cells of young embryos of Tropaeolum majus show that the activity of acid phosphatase increases from micropylar to chalazal pole. The con
Define Importance of Bioelectrical impedance analysis? Bioelectrical impedance analysis (BIA) is a rapid, non-invasive and relatively inexpensive method for evaluating body com
Define briefly about the Conjugated Proteins? Conjugated proteins are made up of simple proteins combined with a non- proteinous substance. The non-proteinous substance is know
Q. What is the difference between phanerogamic and cryptogamic plants? Cryptogamic (hidden sex organs) plants are those that do not present seeds or flowers. They comprise the
Devonian is the period of geologic time from 410 - 360 million years before the present. Life on land diversified, with amphibians appearing late in this period of time. Plants we
Q. Symptoms of ulcerative colitis? As discussed in the case study above, the common symptoms are: 1. Mild abdominaI discomfort, an urgent need to defecate several times a da
In an experiment, isolated chloroplast thylakoids were incubated at pH 4.0 with ADP and inorganic phosphate (Pi) added to the medium and then transferred to a medium having pH 8.0.
type study of polystomella
What are the Sources of Nutrients of Cornea? Sources of Nutrients of Cornea: 1) Oxygen for the endothelium comes from aqueous humour and for epithelium from atmosphere th
There are three methods of collections: 1. Kerbside collection: In this collection system the refuse is brought in containers and placed on the footway, from where it is
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