ago. To find out the history of the Australian fauna scientists used stable carbon isotopes from the emu eggshell (a flightless bird native to Australia). The samples were largely taken from Lake Eyre. The carbon composition of the eggshell tells us the composition of the bird’s diet (over 3-5 days). The emus are mixed feeders herbivores‚ eating leaves‚ shoots‚ fruits‚ flowers‚ shrubs and grasses. The variation of the carbon values reflect the changes in the birds diet and hence the composition of
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letter X is most likely? a) fatty acid b) DNA c) PGAL d) an amino acid 3. Which process is represented by equation I? a) photolysis b) carbon fixation c) synthesis d) the dark reaction Photosynthesis and plant structure Photosynthesis is the process of converting light energy to chemical energy and storing it in the carbon-hydrogen bonds of glucose. This process occurs in plants and some algae. Plants need only light energy‚ CO2‚ and H2O to make sugar. The process of photosynthesis
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pre-existing cells Living Things Unicellular: consisting of one cell Multicellular: composed of many cells ∝ All living things: grow and develop‚ regulate metabolic processes‚ move‚ respond to stimuli‚ reproduce AUTOTROPHS: manufacture their own organic carbon compounds from inorganic material ‒ Phototrophic: use light as an energy source for the production of organic molecules eg. All green (chlorophyll-containing) plants are phototrophic ‒ Chemosynthetic: derive energy from chemicals for use in the manufacture
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stimulus with a fixed physiological response. Cognition: animal’s ability to perceive‚ store‚ process‚ and use info. from its sensory receptors. Agonistic behavior: contest to determine which competitor gains access to a resource. Ch. 54- Nitrogen fixation: soil bacteria and symbiotic bacteria in root nodules fix nitrogen in terrestrial ecosystems‚ and some cyanobacteria do so in aquatic ecosystems. Biological magnification: conc. of such compounds increases in each successive link of food chain. Ch
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6. Many organisms can withstand periods of oxygen debt (anaerobic conditions). Yeast undergoing oxygen debt converts pyruvic acid to ethanol and carbon dioxide. Animals undergoing oxygen debt convert pyruvic acid to lactic acid. Pyruvic acid is fairly nontoxic in even high concentrations. Both ethanol and lactic acid are toxic in even moderate concentrations. Explain why this conversion occurs
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Abstract Density functional theory (DFT) calculations have been used to investigate the structural properties‚ dipole moments‚ polarizabilities‚ Gibbs energies‚ hardness‚ electronegativity‚ HOMO/LUMO energies‚ chemical potentials‚ density of states and detonation properties of trans and cis configurations of azocubane. All properties have been obtained using the B3LYP functional and 6-31G(d‚p) basis set. Also‚ IR‚ UV-Vis‚ CD and NMR spectra of the structures were simulated. The volumes of the structures
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CHM 3411 – Problem Set 6 Due date: Wednesday‚ March 23rd. Do all of the following problems. Show your work. 1) Consider the cyclic molecule C8H8‚ the eight carbon analogue to benzene. a) Write the secular detrerminant corresponding to the pi-bonding in C8H8. b) Using the secular determinant‚ the following energies are found for the pi-bonding molecular orbitals: 1 = + 2 2 = + 1.41 (two states) 3 = (two states) 4 = - 1.41 (two states) 5 = - 2 Give the electron
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Chapter 18 1 Takusagawa’s Note© Chapter 18: Photosynthesis 1. CHLOROPLASTS - Photosynthesis is carried out at chloroplasts. Structure of chloroplast Outer membrane Stroma lamellae Inner membrane Thylakoid Chloroplast Granum Dark reaction Stroma Light reaction - Composition of innermembrane and granum membrane are unusual. - Phospholipid (negatively charged) ~10% - Neutral lipid (galactose) ~80% Photosynthesis occurs in two distinct phases: 1. Light reactions --- Generates
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be modify in response to surface-ocean warming. The researchers were very surprised to find out that the plankton would consume up to one third less CO2 at a high temperature. This causes a fading of carbon pump. 11) Subject: ’Black Box’ plankton found to have huge role in ocean carbon fixation/plankton assignment
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best shows the effect of increasing light intensity on the rate of photosynthesis? 2. 3. Which graph best shows the effect of increasing carbon dioxide concentration on the rate of photosynthesis? 4. Which graph best shows the effect of increasing temperature if light and carbon dioxide are not limiting (i.e. the levels of light and carbon dioxide are high). If you plot the rate of photosynthesis against the levels of these three limiting factors you get graphs like the ones below
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