Context and question: During this battle, on September 13, the 4th Division, under John A. Quitman, spearheaded the attack against Chapultepec and carried the castle. Future Confederate generals George E. Pickett and James Longstreet participated in the attack. Serving in the Mexican defense were the cadets later immortalized as Los Ninos Heroes (the "Boy Heroes"). The Mexican forces fell back from Chapultepec and retreated within the city. Attacks on the Belen and San Cosme Gates came afterwards. The treaty of Guadalupe Hidalgo was signed in what is now the far north of the city.
What treaty was signed?
Answer: Guadalupe Hidalgo
Context and question: According to the United States Census Bureau, the city had a total area of 17.037 square miles (44.125 km2), including 10.747 square miles (27.835 km2) of land and 6.290 square miles (16.290 km2) of water (36.92%).
What is the area of water?
Answer: 6.290 square miles
Context and question: Cooperative breeding in birds typically occurs when offspring, usually males, delay dispersal from their natal group in order to remain with the family to help rear younger kin. Female offspring rarely stay at home, dispersing over distances that allow them to breed independently, or to join unrelated groups. In general, inbreeding is avoided because it leads to a reduction in progeny fitness (inbreeding depression) due largely to the homozygous expression of deleterious recessive alleles. Cross-fertilization between unrelated individuals ordinarily leads to the masking of deleterious recessive alleles in progeny.
What leads to the masking of deleterious recesive alleles in progeny?
Answer:
Cross-fertilization between unrelated individuals