Answer:
1.an atom that has gained or lost electrons:

2. produces OH - ions when added to water:

3. produces H† ions when added to water:

Translation is when the mRNA gives a guide to a specific sequence of amino acids
Diploid is 2n and haploid is n.
both immigration and births add individuals to a population.
Answer is B. Pioneer communities contain few species, while climax communities have many species.
Pioneer species are the first species that start life in an area. Their growth is fast and soon replaced by next community. Whereas, climax communities are made of many species. They are stable is not replaced by any other community. They are supporting new life.