What does TW Engelmann experiment?
Engelmann discovered that photosynthesis is dependent on the wavelength of light. Plants do not like all kinds of light, but only blue or red light, for example. For his experiment he illuminated an alga with different colors.
What could Engelmann conclude from his experiment?
What did Engelmann conclude about the congregation of bacteria in the red and blue areas? Bacteria congregated in these areas because these areas had the most oxygen being released. the relationship between wavelengths of light and the rate of photosynthesis.
What assumption did Engelmann make to conclude?
What assumptions did Engelmann make in order to conclude that red and violet-blue light were more effective than green light in driving photosynthesis? The number of bacteria clustered at each wavelength (color) was approximately proportional to the amount of oxygen being produced by that portion of the algea.
How did Engelmann determine the absorption spectrum for algae What were his results?
In Engelmann’s experiment, he used aerotactic (oxygen-seeking) bacteria to determine which wavelengths of visible light were most effective in driving the reactions of photosynthesis in green algae. He then counted the bacteria associated with each region of the alga illuminated by the various colors of light.
Which organism was used by Engelmann for his experiment?
He used the photosynthetic algae for the experiment, where he exposes the algae to the visible spectrum, and he used different algae for the different colors of light.
How did T. W. Engelmann described the first action spectrum of photosynthesis?
The first action spectrum was made by T. W. Engelmann, who split light into its components by the prism and then illuminated Cladophora placed in a suspension of aerobic bacteria. He found that bacteria accumulated in the region of blue and red light of the split spectrum.
Which organism was used by Engelmann in his experiment?
Who was Engelmann and how did he use a prism?
On a microscope slide, Engelmann strung one filament of algae along with a population of motile obligate aerobic bacteria. He then used a prism to split white light into the colors (wavelengths) of the visible spectrum and shone them along the filament of algae.
Which of the following phosphorylates ADP to make ATP?
Terms in this set (10) ATP synthase phosphorylates ADP.
What does the absorption spectrum convey about each pigment Be specific with details?
Each type of pigment can be identified by the specific pattern of wavelengths it absorbs from visible light, which is the absorption spectrum. Chlorophyll a absorbs light in the blue-violet region, while chlorophyll b absorbs red-blue light.
How did TW Engelmann described the first action spectrum of photosynthesis?
Why TW Engelmann used aerobic bacteria during his experiment?
Engelmann used a prism to split light into its spectral components, and then illuminated a green alga, Cladophora, placed in a suspension of aerobic bacteria. The bacteria were used to detect the sites of oxygen evolution.
How are Mendel’s plant lines used in genetic analysis?
Copyright © 1978 by W. H. Freeman and Company.) Each pair of Mendel’s plant lines can be said to show a character difference —a contrasting difference between two lines of organisms (or between two organisms) in one particular character. Contrasting phenotypes for a particular character are the starting point for any genetic analysis.
How many characters did Mendel use in his experiments?
Mendel chose seven different characters to study. The word character in this regard means a specific property of an organism; geneticists use this term as a synonym for characteristic or trait. For each of the characters that he chose, Mendel obtained lines of plants, which he grew for two years to make sure that they were pure.
What kind of experiment did Mendel do with a purple flower?
Fortunately, the description does not alter the final conclusions of the analysis, except in the words used. We turn now to Mendel’s analysis of the lines breeding true for flower color. In one of his early experiments, Mendel pollinated a purple-flowered plant with pollen from a white-flowered plant.
Which is the best way to study gene function?
But to tackle directly the problem of how a gene functions in a cell or organism, the most effective approach involves studying mutants that either lack the gene or express an altered version of it.
