BL21) Which of the following are included as tools of biotechnology when using living cells and their components in eent 2
O A working with cells, working with iman, working with molecules
OB working with genes, working with breeders, working with proteins
oc. working with climate, working with breeders, working with molecules

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.