AUSTIN, Texas — The Texas Board of Education used a late-night meeting to give preliminary approval to new science textbooks for classrooms across the state late Thursday night, but it blocked signing off on a major new biology text until alleged "errors" in lessons over the theory of evolution are checked by outside experts.

The vote just before midnight did not reject the biology book by Pearson, one of the country's largest publishers. But it delayed approval until three board members appoint a trio of outside experts to check concerns.

Textbook and classroom curriculum battles have long raged in Texas pitting creationists — those who see God's hand in the creation of the universe — against academics who worry about religious and political ideology trumping scientific fact. At issue this time are proposed high school biology books that could be used across the state at least through 2022.

State law approved two years ago means school districts can now choose their own books and don't have to adhere to a list recommended by the Board of Education — but most have continued to use approved books.

The issue is important nationally since Texas is so large that many books prepared for publication in the state also are marketed elsewhere around the country.

Publishers from around the country submitted proposed textbooks this summer, but committees of Texas volunteer reviewers — some nominated by socially conservative current and former Board of Education members — raised objections. One argued that creationism based on biblical texts should be taught in science classes, while others objected that climate change wasn't as settled a scientific matter as some of the proposed books said.

Pearson and many other major publishers weren't willing to make suggested major edits and changes, however.

That prompted some of the board's socially conservative members to call for delaying approval of the book because of concerns including how long it took Earth to cool and objection to lessons about natural selection because "selection operates as a selective but not a creative force."

Members outside the socially conservative bloc claimed their colleagues waited until the dead of night to try to impose ideological edits.

"To ask me — a business degree major from Texas Tech University — to distinguish whether the Earth cooled 4 billion years ago or 4.2 billion years ago for purposes of approving a textbook at 10:15 on a Thursday night is laughable," said Thomas Ratliff, a Republican from Mount Pleasant.

He added: "I believe this process is being hijacked, this book is being held hostage to make political changes."