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Photosynthesis, Energy, and Life - Photosynthesis …

I believe that it is not possible for any plant to give off O2 when it cannot do photosynthesis.

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NOVA - Official Website | Illuminating Photosynthesis

And, once you master your knowledge of photosynthesis, you can relax in the sun with a greater appreciation for the O2 you breathe, knowing that it is produced from the photosynthetic process. Don’t forget the sunscreen—at least SPF 30—you aren’t a plant, after all. Finally, you will realize that the beachside smoothie you are sipping, along with everything else that you have ever eaten, or will ever eat, relies on photosynthesis either directly or indirectly as its source of energy. Unless, of course, you have gotten into the habit of snacking on chemoautotrophs that live in rocks or deep-sea hydrothermal vents. They don't use photosynthesis.

To answer those questions, we first have to understand what leaves are and what they do

In the first phase of photosynthesis, cellular protein pigments called chloroplasts are excited by light that propels them into high-energy states. The chloroplasts then transfer this energy through electrons to other protein complexes (read: several proteins stuck together). This group of proteins is called the electron transport chain. The proteins operate similarly to a group of dominoes: after the first one has been pushed, each protein transfers energy to each member along down the line.

Autumn Leaves and Fall Colors - Why do autumn …

You are probably wondering how photosynthesis can have anything to do with lawn care

Urban forests help to improve our air quality. Heat from the earth is trapped in the atmosphere due to high levels of carbon dioxide (CO2) and other heat-trapping gases that prohibit it from releasing the heat into space. This creates a phenomenon known today as the “greenhouse effect.” Therefore, trees help by removing (sequestering) CO2 from the atmosphere during photosynthesis to form carbohydrates that are used in plant structure/function and return oxygen back into the atmosphere as a byproduct. Roughly half of the greenhouse effect is caused by CO2. Therefore, trees act as carbon sinks, alleviating the greenhouse effect.

Most of the broad-leaved trees in the North shed their leaves in the fall. However, the dead brown leaves of the oaks and a few other species may stay on the tree until growth starts again in the spring. In the South, where the winters are mild, some of the broad-leaved trees are evergreen; that is, the leaves stay on the trees during winter and keep their green color.

This tutorial introduces photosynthesis

possible for any plant to give off O2 when it cannot do photosynthesis.

The palo verde is an odd-looking tree that dots the Sonoran Desert landscape of the southwestern United States and northern Mexico. Its branches hang low, and are unusually twiggy. Instead of a singular trunk that rises to some height before branching off, the palo verde sprouts about four to six major stems not quite a foot from the ground. Most striking is that from top to bottom, the palo verde is green, hence its Spanish name, which translates to “green wood” in English.

I have koi in outside fish ponds. At times during the long summer days there is an occurrence called an algae bloom where the water in the pond becomes filled with very small suspended algae. During the day there is no problem with the respiration of the koi that I have in the pond… but because the algae use up so much available oxygen during the night and do not add any O2 to the water…my koi in the very early morning hours before the sunlight starts photosynthesis of the algae run out of the amount of oxygen they need for respiration and are forced to breathe atmospheric O2 at the surface of the pond! They gasp for O2 out of the water from the atmosphere where there is enough available for them to survive. My point is in water ponds there is a semi closed environment where plants can use up so much oxygen at night that they force the fish to get their oxygen elsewhere. When days become shorter the algae bloom will naturally diminish if I wait it out and do not do massive water changes or resort to killing the floating algae with a chemical plant killer algaecide that will not kill my fish if used in the proper doses. Plants do use O2 at night and do not give off any O2 in darkness!

09.04.2007 · The palo verde is an odd-looking tree that dots the Sonoran ..
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Guide to Fall Colors in Upstate New York

At night, when photosynthesis can’t take place, plants continue to consume oxygen but they don’t release any back into the room. Would that mean that plants really do compete with humans for oxygen?

Taiga Kids Do Ecology - KDE Santa Barbara

Water (H2O) is split in this process, releasing oxygen (O2) and hydrogen ions (H+). The electrons from the electron transport chain combine with these H+ ions and nicotinamide adenine dinucleotide phosphate ions (NADP+) to form adenosine triphosphate (ATP) and a reduced unit of NADP+, called NADPH (NADP plus an electron, or H). These energy storage forms, ATP and NADPH, are used to convert carbon dioxide (CO2) to build carbohydrates during the second phase of photosynthesis. Plants can then break down these carbohydrates to fuel their existence.

Plants make their own food thru the process of photosynthesis

What could the tree possibly gain from being green all over, you ask? The palo verde’s bark is equipped with chlorophyll, which enables it to conduct much of the plant’s photosynthesis.

Garden - How To Information | eHow

At the same time other chemical changes may occur, which form additional colors through the development of red anthocyanin pigments. Some mixtures give rise to the reddish and purplish fall colors of trees such as dogwoods and sumacs, while others give the sugar maple its brilliant orange.

Photosynthesis - Song with Free Worksheets and …

Why can’t the leaves do the job? All plant leaves have tiny holes called stomata through which water evaporates in a process called transpiration. The palo verde is what’s known as drought deciduous. During especially dry, hot periods, drought deciduous plants drop their leaves in order to prevent losing water. When the leaves go, the tree’s branches take over the job of photosynthesis.

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