AboutBrian Rogers Expertise LDS for over 45 years. Very knowledgable regarding LDS theology and practices, Early Christian history, Biblical inerrancy, etc. active on FAIR private list.
BYU and UoU
Question The Book of Mormon mentions several animals, plants, and technologies that did not existed in pre-Columbian America. These include asses, cattle, milk, horses, oxen, sheep, swine, goats, elephants, wheat, barley,figs, grapes, silk,steel,bellows, brass, breast plates, chains, copper working, iron working, plows, swords, scimitars, and chariots. However,the Smithsonian Institution has stated that "none of the principal food plants and domestic animals of the Old World (except the dog) were present in the New World before Columbus."
How do you answer this problem in the B.O.M.?
Answer S,
The challenge you present has been answered many, many times before. I suggest you begin here:
The link will give you responses to many of the questions critics of The Church of Jesus Christ of Latter-day Saints regarding the Book of Mormon. I believe the questions you ask are answered in the "anachronisms".
Good luck in your research. Please make sure you read both sides of the issues, from reliable sources, not from those who only have an axe to grind.