Homologous pairs, Eg. X and Y
One pair in paternal and the other in maternal, obtained during Meiosis.
You may be referring to the nucleus. The nucleus controls the cell, and it contains chromosomes (DNA) genetic makeup. Hope I could help|!
The extermination of the dinosaurs, the start of a rise to dominance of mammals and a meteorite effect in mexico marks the boundary among the mesozoic and the cenozoic or as named as the k-p boundary. In addition, the cretaceous paleogene (K–Pg) boundary which is previously recognized as the cretaceous tertiary (K–T) boundary is a geological signature typically a thin band of rock.
Answer:
The hydrochloric acid produced by the stomach for digestion.
Explanation:
Due to the hernia, there is poor sphincter control thus allowing backflow of the acid into the eaophagus
