what do autotrophs do during photosynthesis - …
What do autotrophs do during photosynthesis
The system that sustains world population isalready under stress. The growth in per-capita energy use, whichhad been increasing continually since the advent of fossil fuels,began to slow down some twenty years ago -- and the acceleratingpace at which it has been slowing down suggests that there willbe no growth at all by the year 2000 (Figure 4). Agriculture isin trouble; it takes more and more fertilizer to compensate forlost topsoil (Ehrlich & Ehrlich, 1990, p. 92), and nearlyone-fifth of the world's population is malnourished (Corson,1990, p. 68). In fact, the growth rate of the earth's humanpopulation has already begun to fall (Figure 5).
Do autotrophs and heterotrophs both use cellular respiration?
The leftover oxygen atoms from splitting water form waste oxygen gas, the Hydrogen ions are used to make ATP, and the electrons are passed down the "electron transport chain".
There are actually two electron pumping stations, called photosystems, in the light reaction, which is more efficient than one.
Define autotrophs and heterotrophs, ..
Until quite recently, however, there was no realinnovation in the fuel used to make fire. For hundreds ofthousands of years, fire was made with the tissues of recentlydeceased organisms-principally wood. The development of charcoalimproved on the energy density of untreated wood, and made asubstantial contribution to metallurgy. Then, just a fewmillennia later, the same oxygen-deprived roasting process wasapplied to coal. In England, coal had been used to heat livingspace since the Norman Conquest, but the development of coke andits suitability for steelmaking set off the IndustrialRevolution. Within an evolutionary wink, petroleum and naturalgas were also being exploited, and had begunto dissipate the rich deposits of organic energy that had beenaccumulating since the beginning of life. If the slow accretionof these deposits in the face of universal entropy can be likenedto the buildup of water behind a dam, then with the appearance ofa species capable of dissipating that energy, the dam burst.