Are there any birds that can't fly

Answer:

genetic

Explanation:

does genetic and population separeted

Answer:

Coagulative necrosis

Explanation:

• When cell death occurs due to ischemia or infarction then this is termed as Coagulative necrosis.
• During this type of necrosis, cell death occurs in a localized area due to lack of oxygen and other nutrients.
• When a two year old swallows watch batteries then these batteries becomes trapped in the digestive system and inside the digestive tract , the positive and negative terminals of the battery gets bridged by the mucosa leading to the production of the electrical current and increase in the pH of the mucosa.
• All these condition leads to coagulative necrosis due to which the kidney gets affected and heart failure occurs .

B

Transformation of  plasmids with antibiotic-resistant genes (in addition to desired genes to be transformed) is done in the lab mainly as a tool of artificial selection to eliminate bacteria that did not take up the exogenous DNA.

Explanation:

Transformation must occur in competent cells which can be artificially induced by culturing the cells in divalent cations like calcium chloride, or by electroporation. Nonetheless, cells can take up any exogenous DNA when they become competent. The exogenous DNA after being taken up is involved in recombination with the cell's DNA. This ensures that the exogenous DNA is incorporated into the genome of the cell hence exhibiting the new genes in phenotype. This is one method of creating transgenic organisms.

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