They live in groups for protection from predators could be one
Petrified wood is a rock that i have seen
Answer:
This is an epidemic form of conjunctivitis which almost always affects both eyes. The patient may complain of a foreign body sensation, with watering, discharge, redness, and swelling of the lids. They may also complain of the eyes being sensitive to light, with blurred vision.
The answer for this one is b) Looping of DNA
