Sound is already used in accordance with its limitations, as is scent. Metabolism, on the whole, tends to build complex molecules out of simple ones. True, raw concentrated nitric acid is rather hard on most if not all Terrestrial tissues; but we do handle hydrochloric acid—admittedly in rather dilute form in spite of the antacid-tablet ads—in our own digestive systems.
Could there be an ammonia-based life, in place of our own water-based one, on a cold planet like Jupiter? Perhaps the most nearly happy-medium advice that can be given is this: That is, it can become aware, somehow, of some alteration in its environment, and will then produce an alteration in itself that will allow it to continue to live as comfortably as possible.
Vertebrates have been flying for nearly two hundred million years, which for most of the forms involved means about the same number of generations; but we have no supersonic birds on this planet.
A living thing can sense and it can respond adaptively. Similarly, fourth-dimensional extrusion will have to be general on Regulus IV, and the local ecology will reflect the fact.
For that matter, we may be facing such a necessary broadening of the definition right here on Earth in the near future. Wednesday 9 am - 10 am Semester 2: Neither chlorine nor fluorine occurs free on this planet; but, as pointed out already, neither would oxygen if earthly life were not constantly replenishing it by photosynthesis.
Will there come a point when machines will be complex enough and flexible enough to reproduce the properties of life so extensively that it will become necessary to wonder if they are alive?
Certainly some creatures can sense the latter directly you can yourself, for that matter; bring your hand close to a highly charged object and feel what happens to the fine hairs on your skin. What can this thing do? The germ of life is there, even though dormant.
Something like out of every atoms in the universe are hydrogen atoms; even Earth, which seems to be one of the most thoroughly dehydrogenated objects in the observable part of space, has all it needs for an extensive collection of life forms. The process takes place more quickly in warm conditions because of greater movement of particles.
The first question at least can be partially answered without recourse to mysticism. We know a good deal about Earthly muscle chemistry these days; maybe a pushing cell could be worked out.
We become safer, then, if we define life as the property displayed by those objects which can—either actually or potentially, either in whole or in part—move, sense, and respond, metabolize, grow, and reproduce in such a way as to decrease its entropy store.
Yet the situation is not at all clear-cut. This video gives a more detailed discussion of the topic of cellular respiration.Tasks.
Skills. Recommendation. Activity: When is a reaction balanced? Interpreting, writing formulae, balancing equations. Optional (Suggested) Activity: Magnesium burning in. Arrhenius equation - Arrhenius reation rate theory - Homogeneous and heterogeneous catalysis.
Photochemistry • Statement of Grothus - Draper Law, Stark-Einstein's Law, Quantum Yield. Hydrogen chlorine reaction (elementary idea only) Photosynthesis, Photsensitisation, Phosphorescence Fluorescence, Chemiluminiscence - Definition.
Home > Animations: Here are some flash animations produced for my own teaching and free for you to download and use as you wish. Module directory The Module Directory provides information on all taught modules offered by Queen Mary during the academic year How come plants produce oxygen even though they need oxygen for respiration?
Question Date: Answer 1: By using the energy of sunlight, plants can convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis.
As photosynthesis requires sunlight, this process only happens. Learn biology 1 with free interactive flashcards. Choose from different sets of biology 1 flashcards on Quizlet.Download