"outline the process . in vitro fertilisation including down-regulation. b. superovulation".c. harvesting. d. fertilization. e. implantation.

The answer is letter A.

Explanation:

In virto fertilisation is a reproductive process, in which, embryos are produced after the extraction of the egg and the sperm from the childless couple.

First the woman is submited to a threatment to stop her menstrual cycle, then the doctor puts her under hormones threatment to estimulate her ovaries to develop follicles. After this step, a HCG is injected at her, so that the doctor can collect the eggs.

The man provide his semen after ejaculating in a dispenser. The physicians mix the egg and the semen and check if the fertilisation has been successful.

If the result is positive, the embryos are implanted inside of the woman's uterus.

After a few weeks the woman should take a pregancy test to confirm the pregnancy.

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.