What are the physical properties of the intertidal zone that make it an extreme environment for the animals that inhabit it?

What must happen before meiosis can begin? a. four gametes must be produced b. the four tetrads must be pulled apart c. dna doubles and produces sister chromatids d. the cell membrane pinches together

The galapagos island contain 13 species of finches four of the species are seen here it is believed that all of the species had one common ancestor and overtime

What controls activities within a eukaryotic cell?