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The rate of photosynthesis in the blue-green alga P.

Background Info Guard cells open and close to let stomata take in Carbon Dioxide that is required for plants to make glucose in photosynthesis, the Carbon Dioxide comes in through stomata, which consist of guard cells which contract and relax (become turgid and flaccid) depending on the amount of water that inside them making them turgid....

In the case of this manuscript, the radiocarbon result is 1150 ± 50 . This indicates that the age is 1150 with a standard uncertainty of ±50 years. The age of 1150 is calculated using the simplistic assumption that the amount of radiocarbon in the atmosphere has always been the same. Earlier we have noted that this is not quite the case except that it is a rough indication of the age. Hence the measurement must be calibrated against samples of known ages, for example, the tree rings. The radiocarbon data and the calibration curve are used to plot the probability distribution of the age of the manuscript. In the case of the E20 manuscript from St. Petersburg, the 68.3% confidence level (1σ) yields the ranges, 781–791 CE, 825–843 CE, 859–903 CE and 915–977 CE. The 95.4% confidence level (2σ) yields 775–995 CE.


Photosynthesis and transpiration rate of ..

So we can summarize by saying that the photosynthetic plantstrap solar energy to form ATP and NADPH (Light Phase) and thenuse these as the energy source to make carbohydrates and otherbiomolecules from carbon dioxide and water (Dark Phase),simultaneously releasing oxygen in to the atmosphere. Thechemoheterotrophic animals reverse this process by using theoxygen to degrade the energy-rich organic products ofphotosynthesis to CO2 and water in order to generate ATP fortheir own synthesis of biomolecules.

Plant photosynthesis, both the Light Phase and Dark phasereactions, takes place in chloroplasts, which may be regarded asthe "power plants" of the green leaf cells. At night,when there is no sunlight energy, ATP continues to be generatedfor the plant's needs by respiration, i.e., oxidation of(photosynthetically produced) carbohydrate in mitochondria(similar to animals).

Which particular plant has the highest rate of photosynthesis?

Chloroplasts have many shapes in different species but aregenerally fusiform shaped (and much larger than mitochondria) andhave many flattened membrane-surrounded vesicles called thylakoidswhich are arranged in stacks called grana. Thesethylakoid membranes contain all of the photosynthetic pigments ofthe chloroplast and all of the enzymes required for Light Phasereactions. The fluid in the stroma surrounding the thylakoidvesicles contains most of the enzymes for Dark phase reactions.

The highest rate of 14C production takes place at stratospheric altitudes of 9 to 15 km. Unlike the commonly available carbon, 12C, 14C is unstable and slowly decays, changing it back to nitrogen and releasing energy. This instability makes it radioactive. The 14C isotope is brought to the earth by atmospheric activities (such as storms) and becomes fixed in the biosphere. Since 14C reacts just like 12C and 13C isotopes of carbon, it becomes part of a plant through photosynthesis reactions. Animals eating these plants in turn absorb 14C as well as the stable isotopes (i.e., 12C and 13C). This process of ingesting 14C continues as long as the plant or animal remains alive. Because 14C is so well mixed up with 12C, the ratio between 14C and 12C is the same in a leaf from a tree, or a part of an animal body. 14C also enters the Earth's oceans in an atmospheric exchange and as dissolved carbonate. The entire 14C inventory is termed the .[4]

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2 uptake rate in the detached leaf to that of the ..

Temperature affects the rate of photosynthesis

Photosynthesis converts these energy- depleted compounds (ADPand NADP+) back to the high energy forms (ATP and NADPH) and theenergy thus produced in this chemical form is utilized to drivethe chemical reactions necessary for synthesis of sugars andother carbon containing compounds (e.g., proteins, fats). Theproduction of high energy ATP and NADPH in plants occurs in whatis known as Light Phase Reactions (Z Scheme) (requiressunlight). The energy releasing reactions which converts themback to energy-depleted ADP and NADP is known as Dark PhaseReactions (Calvin Cycle) (does not require light) in whichthe synthesis of glucose and other carbohydrates occurs.

Does photosynthesis occour in a leaf detached from …

Age measurements are possible because 14C becomes a part of all organic and inorganic carbon compounds and a steady state between the uptake (photosynthesis or food) and the decay of 14C exists as long as the organism is alive. After death, the only remaining process is decay ( decay in which 14C decays to nitrogen). Measurement of the -decay rate or counting the remaining 14C atoms gives a measure of the time that elapsed since the steady state is broken. After the emission of , i.e., a beta particle, 14C is changed into stable and non-radioactive nitrogen, 14N. In other words, the 14C/12C ratio gets smaller and smaller over time. So, we have something like a "clock" which starts ticking the moment a living being dies. Thus it can be said that the radiocarbon dating method can, in principle, be uniformly applied throughout the world.

Evaluation of Protocols for Measuring Leaf Photosynthetic ..

For each electron flowing from water to NADP+ (a net change in1.14 volts), two quanta of light are absorbed, one by eachPhotosystem. Each molecule of oxygen released involves the flowof four electrons from two water molecules to two NADP+s andrequires four quanta of sunlight absorbed by each Photosystem toprovide the energy to do this. These are the "Light PhaseReactions" of photosynthesis, which produce two high energychemical products, namely NADPH and ATP.

Photosynthetic Performance during Senescence in ..

Therefor these two (Light and Dark) phases are interlinked andcomplimentary. And in the end, the plants have utilized theenergy of sunlight to produce glucose (and ultimately othercarbohydrates, proteins and fats) and oxygen from water andcarbon dioxide.

bio 3.1 | Photosynthesis | Plants

During the construction of gates for shrimp ponds a number of requirements should be kept in mind (ASEAN/SCSP, 1978), and the gates should:

(i) be durable, water-tight, and made of locally available materials; (ii) have adequate capacity for the amount of water to be taken in or drained; (iii) allow water to be taken in or discharged at the bottom; (iv) have provisions for draining pond surface water; (v) have gate bottom elevation that permits complete draining of pond water; (vi) have slots or grooves for the placement of outside and inside screens to prevent undesirable species from entering the pond and the shrimps from leaving the pond; (vii) have place for net installation for harvesting; and (viii) be easy to operate.

Pond management techniques for finfish and shrimp culture, while varying slightly depending on the specific biological requirements of the culture organism, the type of culture system, and the culture environment (freshwater, brackishwater, and marine), are similar in that they involve the following basic activities:
(i) Pond preparation/conditioning.
(ii) Stocking.
(iii) Feeding and/or fertilization (depending on the culture system used).
(iv) Water management.
(v) Pond maintenance, and
(vi) Harvesting.

both leaf A and leaf B were detached ..

In a broad chemical sense, the opposite of photosynthesis isrespiration. Most of life on this planet (all except in the deepsea vents) depends on the reciprocal photosynthesis-drivenproduction of carbon containing compounds by a series of reducing(adding electrons) chemical reactions carried out by plants andthen the opposite process of oxidative (removing electrons)chemical reactions by animals (and plants, which are capable ofboth photosynthesis and respiration) in which these carboncompounds are broken down to carbon dioxide and water.

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