Question

1. The radii of two circles are 19 cm and 9 cm respectively.
Find the radius of the circle which has circumference equal
to the sum of the circumferences of the two circles.
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Answer 1

hope this answer will help you

Answer 2

Answer:

The two core techniques that enabled birth of modern biotechnology are :

1. Genetic engineering—Techniques to alter the makeup of genetic material (DNA and RNA), by introducing new genes into host organisms and thus change the phenotype of the host organism.

2. Maintenance of sterile (microbial contamination-free) environment in chemical engineering processes to enable growth of only the desired cell in large quantities for the manufacture of biotechnological products like antibiotics, vaccines, enzymes etc.