The border between the
transparent edge of the cornea and the white of the fibrous sclera is the limbus.
The limbus contains clusters of limbal stem cells that help to maintain the corneal
epithelium and to regulate corneal transparency and vision throughout life. The
limbus also acts as a boundary that protects the conjunctiva and its blood
vessels.
Rainwater picks up carbon dioxide from the air and as it percolates through the soil, which turns into a weak acid. This slowly dissolves out the limestone along the joints, bedding planes and fractures, some of which become enlarged enough to form caves.
Answer: rock rain on Corot-7b and diamond rain on saturn
Explanation:
<span>Recycled water vapour from the flask with heated water (represents Earth's early ocean) represented the rain. Those vapour supposed to be similar to the water evaporations from lakes and seas, before going into the atmosphere and forming the rain.</span>
Apparatus also contained:
<span>· </span>mixture of gases similar to those found in Earth's early atmosphere, water (H2O), methane (CH4), ammonia (NH3) and hydrogen (H2) that were circulated inside a sterile array of glass tubes and flasks connected together in a loop.
<span>· el</span>ectrodes delivered an electric current which was simulating lightning
<span>· t</span>he flask with heated water
