Which of the following statements is/are incorrect? Intramembranous and endochondral ossification both involve replacement of preexisting connective tissue with bone. Intramembranous ossification is the method by which flat bones of the skull, some facial bones, the mandible, and part of the clavicle are formed. Endochondral ossification is the method by which most of the bones of the body are formed. Endochondral ossification begins with development of an ossification center.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

answer: dna

because all cells have genes