Discovery In 1928 it was discovered by Frederick Griffith in an experiment generally known as transformation.
Experiment
In his experiment he considered two strains of <em>streptococus pneumonia,</em> one was R-type which was non-virulent and cause no disease in mice, other was virulent and S-type which cause disease and at last death of mice.
This experiment was comprised of four steps which are as follow:
Step 1: First he injected living strain of S into mice, after sometime mouce died.
Step 2: He injected living strain of R into mice, the mice alive as he did not got any disease.
Step 3: He injected heat killed strain of S into mice and mice remain alive.
Step 4: He mixed living R strain with heat killed S strain and then inject into mice. As a result the mice died.
Conclusion: It was found that genetic material from heat killed S stain were transferred to living R (non-virulent) strain, as a result R become virulent and cause the death of mice.
Rose bush because not many animals eat rose bushes
Morphological character such as leaf, node density , bud number,etc. change in many plant species in response to factor such as light availability , soil compaction and organic matter removal.
Vegetative and reproductive characteristics are the two systems are common to nearly all vascular plants and provide a unifying theme for the study of plants morphology. It is important for the role to identifying plants, classification is also done by knowing the morphology of the plants.
Morphology is to identify plants using morphological characteristics. Plants can be identifies by observing certain distinguishing morphological characteristics but some plants are closely relatable , by which it shown by the similarity of their flower structures.
To learn more about the Vegetative and reproductive here
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Answer:
The scientific name or the binomial nomenclature has a number of advantages over using the common names. 1. Organise and classify - the organism can be easily categorised, this really helps making it easier to understand the characteristics of a specific organism in an organised chart.
Explanation: