Overaeration lungs: Hyperaeration means lungs contain larger amount of air than normally expected. Has many causes. In children can be seen with diseases causing air trapping such as bronchiolitis, asthma, cystic fibrosis, congenital heart disease, early aspiration, and metabolic acidosis.
Barbara McClintock's World Discovering Jumping Genes For the first half of the 20th century, genes were seen as objects with fixed positions on the chromosomes. However, in the 1950s, Barbara McClintock showed that certain DNA fragments, termed transposons, can be activated to jump from one position on a chromosome to another.
When scientists change the genes of bacteria, or any other living thing, the process is called _____ _____. Scientists have been doing this to bacteria since 1973. In that year, researchers put genes from a frog into the bacterium Escherichia coli. The bacterium then started making copies of the frog genes. Scientists can now engineer bacteria to make many products, such as insecticides, cleansers, and adhesives.