Human CO2 is a tiny % of CO2 emissions“The oceans contain 37,400 billion tons (GT) of suspended carbon, land biomass has 2000-3000 GT. The atpmosphere contains 720 billion tons of CO2 and humans contribute only 6 GT additional load on this balance. The oceans, land and atpmosphere exchange CO2 continuously so the additional load by humans is incredibly small. A small shift in the balance between oceans and air would cause a CO2 much more severe rise than anything we could produce.”
Yes, it is a good research question because it focuses on one aspect of her topic.
<h3>What is a research question?</h3>
A research question is a question that leads to the formulation of a hypothesis or explanation to understand the real world.
A plausible hypothesis needs to be testable, which in this case means to use statistics for example, quality of life of people, to test (reject or confirm) this explanation.
In conclusion, yes, it is a good research question because it focuses on one aspect of her topic.
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Complete question:
You will find the cladogram in the attached files
Answer:
- multicellularity
- xylem/phloem
- flowers
Explanation:
Based on this cladogram, the order of changes was multicellularity, vascular system, flowers.
<em>Multicellularity.</em> The first division or point of divergence is located between moss and the rest of the organisms. Moss is included in the Bryophyta group, characterized for being the first terrestrial plants. They are not vascular plants, and their general structure is simple but pluricellular. Multicellularity implicates association between different cells that specialized in accomplishing different functions. This complex association works to make the organism survive. Algae might be unicellular or pluricellular. Although is not the same, unicellular algae might form colonies, that are groups of cells agglomerated.
Xylem/ Phloem: The second change is related to the vascular system. Cycads are gymnosperms. These are vascular plants that produce naked seeds. The vascular system developed by gymnosperms is very elaborated, with secondary growth, and including supporting cells that allow these plants to get bigger dimensions, particularly in height.
Flowers: The last change is related to the emergence of flowers. Arabidopsis is included in the angiosperm group, the most evolved one, with great capabilities of reproduction and dispersion. They have flowers, which carry the reproductive structures. Once occurred fertilization, fruits develop and carry the seeds. Flowers might be unisexual or hermaphrodites. Their vascular system is also very complex and adapted to different environments.