Which scientist showed that organisms did not grow spontaneously in beef broth

Louis Pasteur

Explanation:

Louis Pasteur, contrary to the theory advocated by Needham (theory of ambiogenesis. This theory defends the idea that life can be spontaneously generated from inanimate matter), placed broth in a long-necked glass balloon that It was then curved into an "S" shape. This broth was boiled and remained sterile for a long time even with the glass open. There was no microorganism in this broth.

As the vial has been sterilized and the neck has been bent, the microorganisms present in the air are retained in the curve. It was important to keep the bottle open because proponents of the theory of abiogenesis claimed that a glass with a lid prevents the entry of the "active principle," according to them a nonmaterial life force. With the experiment, Pasteur proved that living things originate from other pre-existing ones, in this case air microorganisms.

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave

the correct answer is b