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Why carnivores are subject to biological magnification of substances like ddt and pcbs?
Carnivores are subject to biological magnification of substances like DDT and PCBs because they occupy higher trophic levels in the food chain. As these harmful substances accumulate in the environment, they are taken up by smaller organisms, which are then consumed by larger predators. Each successive predator accumulates higher concentrations of these toxins through the process of biomagnification, leading to potentially harmful effects on their health and reproductive success. Additionally, carnivores often have lower populations and longer lifespans, further exacerbating the accumulation of these harmful substances.
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Define biological magnification and explain why humans are often more severely affected?
Biological magnification: the process by which pollutants become more concentrated in successive trophic levels of a food web (accumulation of pollutants in fatty tissues of a predator) Humans are often more severely affected than earlier trophic levels due to biological magnification. The ppm (parts per million) is the unit of measurement for concentration of chemicals like pollutants and augment to a degenerative degree in higher trophic levels. Humans are consumers and higher in the food web, thus subject to the malicious effects of biological magnification of toxins.
What is the magnification of a 300mm lens?
The magnification of a lens depends on the camera's sensor size and the distance to the subject. A 300mm lens on a full-frame camera can provide around 5x magnification, while on a crop sensor camera it can offer around 7.5x to 10x magnification.
What is 0.28x magnification?
A 0.28x magnification means that the subject will appear roughly 28% of its actual size when viewed through the lens. This level of magnification is considered moderate and is often used for capturing objects at a slightly larger scale without extreme exaggeration of size.
How does the focal plane change as you change the magnification?
It does not. For an explanation of "focal plane" see the question What is the focal plane?
What is the magnification on a true macro lens?
A true macro lens typically offers a magnification ratio of 1:1, meaning that the subject is reproduced on the camera sensor at its actual size. This allows for detailed close-up photography, capturing fine textures and intricate details that are not visible with standard lenses. Some macro lenses may also offer higher magnification ratios, such as 2:1 or greater, for extreme close-up shots.
What has the author Stefan Wagener written?
Stefan Wagener has written: 'Packing and shipping of infectious substances, diagnostic specimens, biological products, and other regulated biological articles' -- subject(s): Transportation, Diagnostic specimens, Biological specimens
Define biological magnification and explain why humans are often more severely affected?
Biological magnification: the process by which pollutants become more concentrated in successive trophic levels of a food web (accumulation of pollutants in fatty tissues of a predator) Humans are often more severely affected than earlier trophic levels due to biological magnification. The ppm (parts per million) is the unit of measurement for concentration of chemicals like pollutants and augment to a degenerative degree in higher trophic levels. Humans are consumers and higher in the food web, thus subject to the malicious effects of biological magnification of toxins.
Why working distance decreases as magnification increase?
As magnification increases, the focal length of the lens decreases. This leads to a shorter working distance in order to maintain focus on the subject. Additionally, higher magnification requires the lens to be closer to the subject to capture more detail and resolution.
What is the magnification of a 300mm lens?
The magnification of a lens depends on the camera's sensor size and the distance to the subject. A 300mm lens on a full-frame camera can provide around 5x magnification, while on a crop sensor camera it can offer around 7.5x to 10x magnification.
What happens to the working distance when the magnification is increased?
When magnification is increased, the working distance typically decreases. This is because higher magnification levels require the lens or object to be closer to the subject in order to achieve better focus and resolution.
What happens to the working distance as the magnification increases?
As magnification increases, the working distance decreases. This is because higher magnification requires the lens to be closer to the specimen in order to focus properly. Therefore, as you increase magnification, you may need to physically move the lens closer to the subject to maintain focus.
What has the author Warren D Dolphin written?
Warren D. Dolphin has written: 'Biological investigations' -- subject(s): Biology, Handbooks, manuals 'Zoology' 'Biological Investigations' -- subject(s): Biology, Handbooks, manuals 'Biological investigations' -- subject(s): Biology, Handbooks, manuals 'Biological Investigations Lab Manual' 'Biological investigations' -- subject(s): Biology, Handbooks, manuals
If 5x instead of 10x were used what is the magnification?
If 5x magnification is used instead of 10x, the resulting magnification is simply 5 times the original size of the object being viewed. This lower magnification means that the details of the object will appear less enlarged compared to using 10x magnification. Thus, the overall effect is a clearer but less zoomed-in view of the subject.
What is 0.28x magnification?
A 0.28x magnification means that the subject will appear roughly 28% of its actual size when viewed through the lens. This level of magnification is considered moderate and is often used for capturing objects at a slightly larger scale without extreme exaggeration of size.
What has the author I F Henderson written?
I. F. Henderson has written: 'Henderson's dictionary of biological terms' -- subject(s): Biology, Dictionaries 'A dictionary of biological terms' -- subject(s): Biology, Dictionaries
What has the author Bernard Gittelson written?
Bernard Gittelson has written: 'The Gittelson biorhythm code book' -- subject(s): Biological rhythms, Charts, diagrams 'Biorhythm 1995 - 96 - 97' 'Biorhythm' -- subject(s): Biological Clocks, Biological rhythms, Charts, diagrams 'Biorhythm sports forecasting' -- subject(s): Biological rhythms, Physiological aspects, Physiological aspects of Sports, Sports 'Biorhythm Personal Science' 'How to make your own luck' -- subject(s): Success in business
What has the author George Hangay written?
George Hangay has written: 'Biological museum methods' -- subject(s): Collection and preservation, Biological specimens
