Parents can pass on chromosomes to their children that are different than their own when the new gene combinations are created by a) crossing over of sister chromatids during meiosis. b) crossing over of sister chromatids during mitosis. c) crossing over of homologous chromosomes during mitosis. eliminate d) crossing over of homologous chromosomes during meiosis.

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.