Marina Melixetian and her colleagues suppressed the expression of Geminin protein in human cells by treating the cells with small interfering RNAs (siRNAs) complementary to Geminin messenger RNA. Forty‑eight hours after treatment with siRNA, the Geminin‑depleted cells were enlarged and contained a single giant nucleus. Analysis of DNA content showed that many of these Geminin‑depleted cells were 4n or greater.
Explain these results.

Re-replication is allowed on geminin depleted cells

Explanation:

The depletion of the geminin gene by the siRNA leads to re-replication of portions of the genome. This is due to the protein Geminin be responsible to inhibit the replication factor cdt1 and therefore one replication round is allowed in wild type cells at the S phase. Therefore, Geminin-depleted cells will re-replicate their genome causing the enlargement of the nucleus.

from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.    

archaebacteria are found in in forest soil.

hope i spelled it right lol

hope i

-lavira: )