Answer:
The levels of carbon are expected to_increase___ of our oceans
Explanation:
As humans activities increase the levels of carbon dioxide in the atmosphere so do the ocean levels of carbon increase. This is because of the fact that gases from the atmosphere dissolve in and out of the oceans at the interphase between the atmosphere and hydrosphere.
The more carbon dioxide in the atmosphere, the more the gas dissolves in the oceans. This is why more corals are bleaching around the world. The dissolved carbon dioxide is lowering the pH of the ocean waters because of the formation of more carbonic acid.
Learn More:
For more on increased levels of carbon dioxide in oceans check out;
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C is false, because deforestation does not prevent desertification.
Yes; prokaryotic cells are cells with no nucleus
Also E.coli is a bacteria and bacteria are all prokaryotes
Answer:
1- DNA: a specific DNA sequence encodes a transcription factor which activates the expression of target genes involved in cell differentiation
2- RNA: short non-coding RNAs may bind to enhancer regions and thus activate the expression of target genes involved in cell differentiation
3- Environmental factor: temperature may control the expression of genes involved in cell differentiation pathways
Explanation:
The deoxyribonucleic acid (DNA) contains the genetic material required to encode proteins. Some of these proteins are transcription factors involved in the activation of diverse signaling pathways, including, for example, cell differentiation and proliferation. On the other hand, microRNAs (miRNAs) are short non-coding RNAs that have the ability not only to repress but also to activate transcription by binding enhancer sequences. The miRNA activation mechanism has recently been discovered. In consequence, some miRNAs may potentially activate the expression of target genes involved in cell differentiation (e.g., <em>c-myc </em>gene). Finally, environmental factors (e.g., nutrient availability, salinity, temperature, etc.) may also activate gene expression and thus control diverse pathways such as cell differentiation, cell proliferation and cell death (apoptosis).
