Definition of ophthalmology for English Language Learners. medical : the study of the structure, functions, and diseases of the eye.
Pullet: Six Weeks to One Year. Young female chickens less than 1 year old that have fully feathered out and are about the size of large pigeons are called pullets. Expect your barred rock pullet to start laying eggs when she is about 16 to 20 weeks old. Once she begins laying, she should produce one egg every 25 hours â except during the cold, dark hours of winter when she may not lay at all -- until her first molt a year later.
Answer by vanvlj (12). The number of eggs a frog can lay differs by frog species. Some, like the Western Chorus Frog, lay few eggs (20-100) while others, like the Northern Spring Peeper, lay thousands of eggs. The American Bullfrogs lay their eggs in large, flat floating rafts that may contain up to 20,000 eggs.