As an embryo develops, identical cells give rise to specialized cells that perform different functions. what statement best describes the role of rna in the differentiation of a specialized cell? a. all genes in the cell are transcribed into rna molecules, but only some of these molecules are translated into proteins. b. certain genes in the cell are transcribed into rna molecules, which are then translated into proteins specific to the cell. c. rna deletes regions of the dna that are unnecessary to the cell, and then it uses the remaining dna to make proteins. d. rna synthesizes new genes, and then it transcribes and translates these new genes into proteins specific to the cell.

Salmonella typhimurium is a food-borne bacterial pathogen that can cause severe gastrointestinal disease. salmonella is often phagocytosed by macrophages that normally destroy bacterial pathogens, but this bacterium is somehow able to prevent the complete maturation of phagolysosomes. salmonella is able to tolerate the low ph of phagolysosomes, and in fact responds to the drop in ph by secreting toxins that interfere with other cellular responses. which of the following differences would you expect to contribute to the survival of a bacterium within an salmonella-containing phagosome, compared to a healthy phagolysosome? decreased activity of acid hydrolases increased activity of acid hydrolases decreased import of h+ ions increased import of h+ ions my guess is decreased activity of acid hydrolases but i'm not sure.

What role do traits play in affecting an organisms ability to reproduce? finches

How is the national wildlife refuge system similar to the pacific region coastal program? a. both programs are concerned with providing habitats for wildlife b. both programs are primarily concerned with preserving fish species c. both programs have set aside 150 million acres of land d. both programs are under the u. s. fish and wildlife service