Which type of mutation occurs in reproductive cells and can be passed to offspring: ? a. somatic mutationb. germline mutationc. point mutationd. frameshift mutation

The answer is B. germline mutation. 

The germline mutation is heritable variation in the lineage of reproductive (germ) cells. Germ cells are cells that give rise to the gametes, so a mutation in germ cell will be seen in a sperm cell or egg cell but not in a skin cell, for example.

The point mutation is the changes in a single nucleotide base on the DNA molecule.

Frameshift mutation, due to addition or deletion of a base, results in the change of reading frame and totally different translation

Somatic mutation is mutation in a somatic cells and is not passed on to the next generation. 

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.