Do immature fruits perform photosynthesis? Yes they have chlorophyll bodies. But do they have stomata through which they can absorb carbondioxide like the green leaves? Sincerely Ulrik
122352
Most immature fruits are green: peppers, pine cones, plums, lots of them. I want to know if the green is from chlorophyll in the cells. Do the fruit cells perform photosynthesis? When you cover a green stem or leaf, it will turn pale and stretch. That is because the stems have little need for chlorophyll in the dark, which is why they are pale. They stretch because the auxins in the stems are not destroyed by the photons, and the stems stretch out and topple over. If a green fruit is covered, will it turn pale and stretch like that?
25163
I've always understood the plural of fruit to be fruit, not fruits.  I was looking at some marketing material and they used the word "fruits" in the following context:      A unique infusion made with ... strawberry, raspberry and cranberry fruits    In discussion with someone about this sentence, he described that the  is not necessarily always people, and could be persons. Therefore it's possible that fruits could be a legitimate plural form.  Is fruits used correctly in this context, or could it be used correctly in ANY context?
30604
I am studying the aerobic degradation of glucose and it seems that for every glucose molecule we should obtain $\ce{10H2O}$ molecules. However, it is known that we only obtain 6.  $\ce{C6H12O6 + 6O2 -&gt; 6CO2 + 6H2O}$  (I am not going to focus in all products and reactants, but just in the important ones for the formation of water molecules)   First, in the glycolysis, for each molecule of glucose we obtain two water molecules, $\ce{2NADH+}$ and 2 pyruvate molecules. By the oxidation of two pyruvate molecules we obtain $\ce{2NADH+}$ and 2 acetyl Co-A molecules. So we are going to pass twice through the Krebs cycle, obtaining $\ce{6NADH+}$ and $\ce{2FADH2}$, and requiring 4 water molecules.  So, when we arrive to the electron transport chain, we have a negative balance of 2 water molecules, and we have $\ce{10NADH+}$ and $\ce{2FADH2}$. We have been told that for every of these molecules 2 electrons go to the electron transport chain, that means that a total of 24 electrons go to the system. The problem comes here:  $\ce{4e- + 4H+ + O2 = 2H2O}$  So, bearing in mind that we have $24e^-$, 12 water molecules should be formed, so at the end, we have gained 10 water molecules, but we know that the number of water molecules formed should be 6. So, clearly there is something wrong in my explanation. I would be very pleased if you could tell me what is wrong.  Thanks in advance.
88571
I purchased a "Y-hibiscus starter" from the tropical island's shop today.  After some research I discovered that this would grow into a new class of plants -- bushes.  Do bushes have the same growing patterns and restrictions as trees?  For example, can they be planted near structures?  Can they be planted next to each other?
106806
There are some fruits* that cause a peculiar (unpleasant) numb sensation in the mouth. An unripe  or a  are two examples that come to mind. I can't describe the feeling any more eloquently so my bet/hope is that you will know what feeling I am talking about.  Is there a word in English that describes the mentioned quality of these fruits and/or the sensation in the mouth?   *I don't know that only fruit can cause it, but I can't think of anything else at the moment.
32641
An ageing gent says he does not accept this statement:  It's a fact that greenhouse gases, predominantly water vapour, keep the Earth  from being hostile and cold; that CO2 albeit in trace quantities is also a  greenhouse gas and therefore helps keep the planet warm...   I know no more about why he rejects this statement - maybe it is that water vapour alone would do the job. The gent in question has a first class degree and a doctorate in physics.    Is there a debate within the physics community over this or am I misunderstanding?
104142
Don't say that a layer of carbon dioxide covers the flame, because our breath has more oxygen than carbon dioxide. Also, our breath does not extinguish the flame by cooling it as it is itself warmer than the coolness required to extinguish it. So what is happening here?
119773
I recently fell ill with a cold, and began to take a vitamin C capsule each day to help my immune system. When I noticed no change in my condition, I began to incorporate an abundance of citrus into my diet instead of taking the capsules. When I ate the citrus my condition began to improve markedly.   The ingredients listed by the vitamin manufacturer are:   Ascorbic Cellulose Gel Hydroxypropyl Cellulose Croscarmellose Sodium Stearic Acid Magnesium Stearate Silicon Dioxide   Not excluding the possibility of coincidence, I was was intrigued. Has evidence been published to suggest that nutrients in whole foods like vitamin C in citrus fruits are more readily utilized in the body than nutrients in vitamin capsules?
8343
Once I asked this question from my teacher and he replied "Because it passes light.". "And why does it pass light?" I asked and he said, "Because it is transparent.".  The same question again, Why glass is transparent? Why does light pass through it, while for opaque objects, it does not?
87650
Was drafting an email and my senior wanted to type "Planting saplings is our way of saying we care for our Nature". I felt that's wrong English. Shouldn't it be "we care for Nature"? (it makes it a bit impersonal to remove the 'our', but if 'our nature' isn't right, can the cuteness factor of mentioning 'our nature' be preserved?. Which is correct?)
9503
I need your opinion about the word order in the following sentence: “In her garden grows a cherry-tree.“? Is it grammatically acceptable?
97076
Have any experiments been carried out involving sprouting and growing plants in a zero gravity environment? If so, what was the outcome? How did the plants sprout out of the soil without gravity? Did they grow outward or toward light sources?
22693
In Frank Herbert's Dune books, the planet Arrakis has an interesting and well thought-out alien ecology. As summarised in , the sandworms eat sandplankton (which consists, at least in part, of larval sandworms), while the sandplankton eat the spice, which is produced by side-effects of the sandworm life cycle.  However, one thing has always bothered me about this: where does the energy come from? On Earth, most ecosystems are powered ultimately by sunlight, while others are powered by . But either way, you need a source of energy or life can't survive.  There seems to be no substantial photosynthesis on Dune, since the planet is almost all either open sand or bare rock. (Some plants are mentioned, but they are all familiar Earth species and were presumably brought there by humans.) Perhaps the sand plankton, or even the sandtrouts or the sandworms themselves, are  --- but if so, where do they get their energy from? In short, where are the  of the Dune ecosystem, and what do they eat?  To the best of my knowledge, this issue isn't mentioned in the original book, but Herbert wrote a lot of sequels, and it seems that having a plausible ecology is something he cared about, so I'm wondering if he addressed this point in any of his later works.
4178
It was observed again and again in the movie Avatar that humans could not breathe the air present in Pandora. So it can be assumed Oxygen was not present in Pandora. But again the human fires which erupted in the Hometree bombing, wouldn't be sustained if there was no Oxygen at all. So what were the components present in the air of Pandora?  On the other hand if there was Oxygen, why could not the humans breathe there? So was the atmosphere in Pandora Oxygen filled or Oxygen free?
66590
All die but one, he continues to try to grow plants.... he dies at the end, but is successful growing stuff. I seem to recall the problem might be ammonia in the soil or the air..?
86407
What happens when secondary colors like yellow,green and magenta are passed through a prism? Will it split into its component colors(for example yellow split into green and red)?If yes why we are observing secondary colors in the visible spectrum obtained when white light(composite light) is passed through a prism?
118090
I read that stars show both absorption and emission lines. While how we see absorption lines is clear to me, I don't understand how (and when) we see the emission lines. Based on what I read in several of your threads such as  we should not be seeing emission lines at all, since all the emissions would come from the hotter interior but those can't reach the outside (unless I misunderstood this point), and the only emission we see is blackbody radiation. But then how do we see the few emission lines such as in the spectrum shown ?