39._A__In plant cells, the middle lamella _____.
40._A__ Where would you expect to find tight junctions?A. in the epithelium of an animal's stomachB. between the smooth endoplasmic reticulum and the rough endoplasmic reticulumC. between plant cells in a woody plantD. in the plasma membrane of prokaryotesE. associated with the quorum sensing of bacterial cells
41.__ Which of the following is nottrue of cell communication systems?
42.___ Different body cells can respond differently to the same peptide hormones because _____.
43.___ Which of the following is characteristic of a steroid hormone action?