|
|
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.
IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.
![Defensive mutualism involves species that receive food or shelter in return for providing protection](https://biology-forums.com/gallery/47/medium_33_02_08_11_9_30_09_14152242.jpeg)
![Reaching out for food on a garden bird feeder. Squirrels can rotate their hind feet, allowing them t](https://biology-forums.com/gallery/47/medium_27692_23_04_12_3_56_52.jpeg)