What is an advantage of sexual reproduction over asexual reproduction in an environment that changes frequently

Which of the follow describes a disadvantage secondary sources have compared to primary sources?

Dna, in the nucleus carries the genetic code for making proteins in ribosomes. in the diagram, b, represents the proteins produced. dna cannot leave the nucleus to carry the genetic information to the ribosome where proteins are produced. how does the genetic code get from the nucleus to the ribosome? what does a represent? now

Thyroid-stimulating hormone stimulates the thyroid gland to secrete sex hormones. true or false