Which of the following statements about transposable genetic elements is not true?

they can cause mutations by inserting into genes.

they are present in multiple copies in the genome.

some use an rna intermediate.

they all use a cut and paste mechanism.

The sentence "They can cause mutations by inserting into genes" is false.

Explanation:

Transposable genetic elements are parts of DNA that can be added into it using the same cut and paste mechanism, they can avoid mutations in some cases, which makes the sentence "they can cause mutations by inserting into genes" false because they revert mutations, not cause them.

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.