The first one this is because the mutation on the frogs front legs could cause it to be harder to swim and even harder to obtain food.
Answer:
Taken in 1952, this image is the first X-ray picture of DNA, which led to the discovery of its molecular structure by Watson and Crick. Created by Rosalind Franklin using a technique called X-ray crystallography, it revealed the helical shape of the DNA molecule.
Iodine test is the answer if im not mistaken
