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Q&A

Posts tagged photosynthesis

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Q&A Is it feasible to have an oxidizing planetary atmosphere without the presence of an organic photosynthesis of some kind on the planet?

With the emergence of cyanobacteria on earth 3.5 billion years ago, the shift from a reducing to an oxidizing atmosphere began. "The atmospheric O$_\textrm{2}$ levels (in PAL; i.e., normalized to ...

1 answer  ·  posted 2y ago by RosesBouquet‭  ·  last activity 2y ago by RosesBouquet‭

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Q&A Archipelago worlds build up atmospheric oxygen faster?

I've read super-earths might become archipelago planets. Picture shallow seas, under a thick atmosphere that alternates between muggy and clammy. Because a bigger share of the surface would be cont...

1 answer  ·  posted 3y ago by aadv‭  ·  last activity 3y ago by aadv‭

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Q&A An ecosystem based on anoxygenic photosynthesis?

The organisms in the oxygen based ecosystem we have today is perfectly adapted to each other. The ocean is filled with water, and on land it falls from the sky. Plants, algae and cyanobacteria spli...

3 answers  ·  posted 3y ago by Trond Jansen‭  ·  last activity 3y ago by Trond Jansen‭

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Q&A A desert planet with temperate polar regions could sustain how much plant-life? Any?

One proposed type of desert planet is one in which the equator and the "tropics" are harsh, hot deserts, but the polar regions are temperate, habitable, and lush with life. You can see an example o...

1 answer  ·  posted 3y ago by cowlinator‭  ·  last activity 3y ago by cowlinator‭

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Q&A What would a silicone-based plant, especially a tree, look like?

This question's information is based on the answer in my previous question about what the aquatic creature need in order to live or survive in my acid water? The thing that's not in the descriptio...

1 answer  ·  posted 3y ago by Li Jun‭  ·  last activity 3y ago by Li Jun‭

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Q&A Alternative to Magnesium's Role in Photosynthesis

It is a known fact that magnesium is a very important part of photosynthesis and chlorophyll. I have looked everywhere to try to find out this question but I have never really gotten a solid answer...

2 answers  ·  posted 3y ago by Altraxian‭  ·  last activity 3y ago by Altraxian‭

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Q&A If humans could photosynthesize, what would our clothing look like?

So we humans get big into genetic modification and figure out how to make ourselves photosynthesize through our skin, and somehow it generates enough energy to be worth our while. Obviously we'd st...

5 answers  ·  posted 5y ago by Jim Wu‭  ·  last activity 3y ago by Jim Wu‭

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Q&A Algae using UV light from auroras for photosynthesis

I was reading some questions on Quora and I found this claim: The polar regions have a very odd reason for them to have so much oxygen production. You see the Polar aurora run day and night in ...

2 answers  ·  posted 3y ago by Renan‭  ·  last activity 3y ago by Renan‭

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Q&A Nocturnal Photosynthesis

It's a basic fact that most plants need sunlight to generate growth. Sure, they also need water and nutrients, but their reliance on sunlight is the one sole thing that separates them from animals...

2 answers  ·  posted 3y ago by JohnWDailey‭  ·  last activity 3y ago by JohnWDailey‭

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Q&A What light would my cloudy planet receive from a red dwarf star?

What light spectrum would hit the surface of a planet orbiting a red dwarf star? The planet is a humid greenhouse with a cloudy atmosphere and a strong ozone layer. Over 80% of the surface is wate...

6 answers  ·  posted 3y ago by CatoRockwell‭  ·  last activity 3y ago by CatoRockwell‭

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Q&A What could justify an animal photosynthesis?

Photosynthesis does not provide enough energy to allow animal activities on its own (see this post for example). But can we think of a species using photosynthesis as a secondary energy source? Her...

7 answers  ·  posted 3y ago by Argemione‭  ·  last activity 3y ago by Argemione‭

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Q&A What stellar qualities would allow our Sun to support human photosynthesis?

I am interested in a character or race of humanoids similar to the green man in the tent in Wolfe's Book of the New Sun. What qualities would the Sun need to have in order to support a race of hu...

2 answers  ·  posted 6y ago by zzu‭  ·  last activity 4y ago by zzu‭

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Q&A Photosynthesis analog, plausible?

So on a planet with a chlorine based atmosphere and only a small amount of oxygen, here is my proposed mechanism for chlorine based photosynthesis. Carbon tetrachloride, since it is a liquid at 7...

1 answer  ·  posted 4y ago by Caters‭  ·  last activity 4y ago by Caters‭

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Q&A Can a planet harbor plants of different colors without one pigment outcompeting the others?

On Earth, all plants are green because they contain the pigment chlorophyll, which photosynthesizes by absorbing all light except green light. However, it is quite possible - if not likely - that ...

13 answers  ·  posted 4y ago by SealBoi‭  ·  last activity 4y ago by SealBoi‭

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Q&A Creating plants that do not rely on photosynthesis but still create oxygen

My planet has an increased axial tilt, resulting in crazier winters and summers and higher temperatures. For most places, the temperature never drops below freezing - even in the winter, but the da...

3 answers  ·  posted 5y ago by Xenobear‭  ·  last activity 4y ago by Xenobear‭

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Q&A Given an apparent solar brightness of <30% Sol from Earth, how differently would plants evolve?

Though my star is 1.71 LSol, my planet orbits at about 2.14 AU. Following a back-of-the-envelope equation for apparent brightness, this gives the surface of my planet approximately 30% of Sol's lig...

3 answers  ·  posted 5y ago by Rúnatál Davino‭  ·  last activity 5y ago by Rúnatál Davino‭

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Q&A Biochemistry of Plants harnessing heat-energy when blue-shifted light is scarce

What biochemical reactions might be employed by plants to harvest heat energy when light energy is scarce or even missing? What is the temperature range over which this biochemical reaction can wor...

2 answers  ·  posted 5y ago by Christmas Snow‭  ·  last activity 5y ago by Christmas Snow‭

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Q&A What would the flora on a Methane world be like?

Linked: What would animal life on a methane world look like and how would it evolve? What would the conditions on a methane world be like? How would an intelligent race on a methane world achiev...

3 answers  ·  posted 7y ago by JDSweetBeat‭  ·  last activity 5y ago by JDSweetBeat‭

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Q&A A double-bright Moon and plant growth

It's Earth and the moon with all parameters as they are in real life with one exception, the moon is twice as reflective as usual. Instead of an albedo of 0.12, the moon has an albedo of 0.24. This...

3 answers  ·  posted 5y ago by Green‭  ·  last activity 5y ago by Green‭

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Q&A Why would plants on an Earth-like planets photosynthesize without using blue-wavelength light?

According to Wikipedia, ...plants are green because chlorophyll reflects green light. And chlorophyll is found in all plants because it is the molecule that absorbs the light that is used to ma...

2 answers  ·  posted 5y ago by JSCoder says Reinstate Monica‭  ·  last activity 5y ago by JSCoder says Reinstate Monica‭

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Q&A How to Use Photosynthesis Creatively in Humans

I've seen many questions here about humans being capable of photosynthesis. And I know, humans don't have enough surface area to power themselves full time. However, that's assuming that the energy...

5 answers  ·  posted 5y ago by Lot-Of-Malarkey‭  ·  last activity 5y ago by Lot-Of-Malarkey‭

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Q&A Chloroplast organelle in human

Could a human's DNA be altered so that in every skin cell they would have a chloroplast organelle? How would this affect the rest of the body?

3 answers  ·  posted 5y ago by Etanos24‭  ·  last activity 5y ago by Etanos24‭

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Q&A A more alien world: Flora

In the (relatively new) Star Trek movie Into Darkness, we see Dr. Bones and Captain Kirk in a world composed mainly of red plants. Obviously these are just eye candy with no real basis behind it, b...

5 answers  ·  posted 7y ago by QuiquÈ…‭  ·  last activity 5y ago by QuiquÈ…‭

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Q&A Calculating the solar spectrum received by a planet

How do I calculate the spectrum of light experienced on the surface of an alien planet? I need it to decide what color the local photosynthetic life will predominantly be.

2 answers  ·  posted 5y ago by Ettina Kitten‭  ·  last activity 5y ago by Ettina Kitten‭

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Q&A Efficiency required of a photosynthetic system to support human level activities

Chlorophyll as we know it on earth is estimated to be between 3% and 6% efficient in converting light energy to useable biomass. This support slow growth and no movement of plants like that observ...

3 answers  ·  posted 6y ago by Green‭  ·  last activity 5y ago by Green‭

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Q&A Creating the Alga of algae

I have to feed my dinosaurs, the plants in the land are mostly destroyed, but the ocean is almost "untouched", so of course, I'm gonna feed my feathery friends with a lot of algae, specially made b...

5 answers  ·  posted 5y ago by Mephistopheles‭  ·  last activity 5y ago by Mephistopheles‭

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Q&A Could a plant-like forest or jungle form in an underground lava dependent ecosystem?

Could an alien underground macroscopic ecosystem including human sized plant-like organisms evolve around lava as an energy source? These organisms could use heat and/or light from the lava to synt...

2 answers  ·  posted 5y ago by Stephen Schroeder‭  ·  last activity 5y ago by Stephen Schroeder‭

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Q&A Thermosynthetic Life-form

As recommended by another user, on a different question I asked, I pose this new question under the following criteria: The creature I'm trying to create has evolved, though it may not have been e...

2 answers  ·  posted 7y ago by Anonymía‭  ·  last activity 5y ago by Anonymía‭

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Q&A Is it feasible for an organism to feed off cosmic radiation?

Cosmic rays are energetic particles coming from space that hit the Earth's atmosphere and produce a lot of secondary radiation (some of which we see in visible light as aurorae). Would it make sens...

3 answers  ·  posted 6y ago by pablodf76‭  ·  last activity 6y ago by pablodf76‭

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Q&A Hydrogenenic Photosynthesis: Strategies for animals

Hydrogenic photosynthesis reduces methane and water to build biomass ($\text{CH}_2\text{O}$) and releases hydrogen: $$\text{CH}_4 + \text{H}_2\text{O} + \text{photons} \to \text{CH}_2\text{O} + 2\...

2 answers  ·  posted 7y ago by rumguff‭  ·  last activity 7y ago by rumguff‭