What factors determine whether a species can be present in a place

Which best describes why nh4+ can form an ionic bond with ci-?

In which block of the periodic table is uranium (u) found? s blockd blockp blockf block

What will most likely happen in the absence of a cell membrane? a) photosynthesis will not take place. b) the cell will not store food, water, nutrients, and waste. c) energy will not be released during cellular respiration. d) substances will pass in and out of the cell in an uncontrolled manner.