Which of the following is mismatched?
fleming – initial identification of penicillin's effect on gram-positive microbial growth
kirby and bauer – disc-diffusion method
florey and chain – identification of penicillium as the producer of penicillin
ehrlich – "magic bullet" theory none of these is mismatched.

Florey and Chain – identification of Penicillium as the producer of penicillin

Explanation:

Alexander Fleming was observed that the Penicillium mold growing in the plate of bacteria inhibited the growth of the bacterial colony. He observed a clear area around the Penicillium mold. He could not purify penicillin. Florey and Chain obtained the cultures of Penicillium from Fleming and set the method for purification of the antibiotic from the culture so that it can be tested on other organisms. With the help of a biochemist Norman Heatley, Florey and Chain devised the purification technique and purified penicillin.

they deliver oxygen to the blood

because of