________ is a language used by nonprogrammers to retrieve information contained in relational databases.

Osteoporosis may contribute to the progression of periodontal disease. Significant decrease in bone mass of the mandible may lead to fragility and increased resorption, risk of fracture, and failure of osseointegration of dental implants

A) Both statements are true. B) Both statements are false. C) First statement is true, second statement is false. D) First statement is false, second statement is true.

Helper T cells are able to recall antigens that previously invaded the body.

Answer the following statement true (T) or false (F)