Cholagogue
发表于 2025-3-30 08:33:56
Behavioral Studies of Free-Swimming Photoresponsive Organisms,f behaviors to examine. Behavior can be studied at several levels. Once we are familiar with the phenomenology of a photoresponse, we can use that behavior to ask questions about the response mechanism. Information can be obtained from determining action spectra, from examining responses of selected
inflame
发表于 2025-3-30 12:52:46
Photosensing in Cyanobacteria, procaryotic cell organization, arose on earth about 2.3 billion years ago. Up to this time, the atmosphere was reducing, i.e. free from molecular oxygen. Since photosynthesis of bacteria is anoxygenic, oxygen sensitive processes such as dinitrogen fixation could be carried through at any place on e
陶瓷
发表于 2025-3-30 17:26:54
Sensory Transduction In ,,,” “Integration,” etc., to summarize the processes by which a stimulus alters the activity of the organism’s motor apparatus. In our laboratory, we have studied in detail the control of behavior by external stimuli in the unicellular flagellate ., and I would like to demonstrate here that for this o
Increment
发表于 2025-3-30 22:49:53
Mechanoresponses in Protozoa,ction or alteration in locomotion. Jennings (1899) detected that the large heterotrichous ciliates . and . have a highly mechanosensitive anterior cell end and a much less sensitive posterior end. Cells that were locally disturbed contracted immediately and then swam backward for a while. Unlocalize
集聚成团
发表于 2025-3-31 02:41:25
Signal Processing in the Transduction Mechanisms of Phototropism,light stimulus produces an asymmetric signal with respect to the growth axis of an organism, a response of differential elongation results in re-orientation of the growth axis. This response is phototropism.
Ablation
发表于 2025-3-31 08:25:39
Mechanisms for the Measurement of Light Direction,is gradient is to be established inside of the organism as is most frequently the case, then an optical dissymmetry must also exist within that organism. The difference in light absorption may be measured at two points in time--a temporal measurement, or at two points in space--a spatial measurement
Obsessed
发表于 2025-3-31 11:48:04
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cleaver
发表于 2025-3-31 16:59:25
Molecular Mechanisms of Photoinduced Chloroplast Movements,other. In small cells, such as bacteria or even most animal cells, diffusion is sufficient for small solutes to move over distances comparable to the size of the cell in fractions of a second. However, plant cells, because of their cell walls, vacuoles, and turgor, are able to grow very large. They
壮丽的去
发表于 2025-3-31 17:57:31
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有斑点
发表于 2025-4-1 01:12:35
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