A nerve cell and a liver cell in the same dog make different proteins. Which of these statements best explains why different cells have make proteins? *

A) The different cells in an organism have different genes.

B) Each cell transcribes (reads) only the genes the cells need

C) The different cells in an organism all transcribe (read) the same genes, but their ribosomes make different proteins from them.

D) Each cell in an organism produces the same proteins, but the ones that aren't needed are immediately digested.

Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos