Which one of the following is a difference between a normal cell and a cancer cell? a. normal cells undergo apoptosis while cancer cells don’t.
b. normal cells do not respond to regulatory signals while cancer cells do.
c. normal cells invade surrounding tissues while cancer cells don’t.

The correct answer is:

A. Normal cells undergo apoptosis while cancer cells don’t.

Explanation:

The most classically employed differences include rapid cell division rate irregular cell surface signaling, abnormal neurological signaling abnormal blood supply .

In a few special cases, targeting these abnormalities works quite well In other cases, it works poorlyAvastin. Usually, when it works poorly, it's because the genetically unstable cancers find a way to get by without whatever you're targeting, or discover other ways to defeat your therapy. Normal cells listen to signals from neighboring cells and stop getting when they trespass on nearby networks Cancer cells ignore these cells and penetrate nearby tissues.

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.