If any egg laying flock does receive an antibiotic, it is usually under the supervision of a veterinarian and only for a short period of time to treat a specific disease outbreak or for prevention of a recurring disease on that farm. What does Grade A mean? Eggs are graded based on their quality and appearance. Grade AA eggs have thick, firm whites and high, round yolks. Their shells are clean and unbroken. Grade A eggs are like Grade AA, but their whites are reasonably firm. Grade A eggs are usually sold in stores. Grade B eggs have thin whites and wider yolks. The shells are unbroken, but might show slight stains. How are eggs packed? An egg is placed in the carton with the large end up.
Arsenic has been known since ancient times, though probably in compound form rather than in its pure state. It is used in combination with other materials in pigments, poison gases and insecticides (such as Paris Green, calcium arsenate and lead arsenate) and is well known from former use as a rat poison.
With the exception of a few non-poisonous species, all other poison dart frogs also use alkaloid poisons. For example, Anthony's poison arrow frog lives in the forests of Peru and Ecuador. It is dark red or brown, with yellow stripes.It harbours two powerful alkaloids called epibatidine and phantasmidine. single golden poison frog harbours enough poison to kill 10 grown men, making these frogs perhaps the most poisonous animals alive. They are one of many species of toxic frogs, which are known as poison dart frogs. They are all small: the largest are no more than 6cm long, and some are just 1.5 cm.