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ejhoff4347
05.05.2020 •
Biology
Some technological solutions to problems like global warming meet the specific needs and situations of local communities. An example from India involves converting the solid waste from cattle into clean-burning fuel for cooking. This reduces the amount of greenhouse gases, specifically methane and carbon dioxide, released into the environment from wood fires. When evaluating the feasibility of implementing this solution, computer models are used to weigh costs against benefits. What factor is least likely to impact the decision on adopting this technology?
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Ответ:
D) education of local residents to maintain equipment
Explanation:
education of local residents to maintain equipment The time and expense needed to train local residents in servicing the digesters used to convert into clean fuel would be offset by the cost of hiring outside technicians and the benefit of reducing local unemployment, so it isn't likely to have a significant impact on evaluating the proposal. The other factors are significant costs or benefits so it is critical to take them into account.
Ответ:
At first glance, it might seem counterintuitive with respect to energy use that many sharks must swim continuously or they will die. why is it important to their metabolic needs that sharks keep swimming? check all that apply.
The answer to the question above is explained below:
Explanation:
Gill involve external extensions from the body surface, it is the respiratory organ in many aquatic animals. They have feathery parts which cause water to move across the animal's body.
Gills are characterized by large amounts of surface area that function in gas exchange.
Sharks are type of fish that have no bones, only cartilage.
Why Sharks needs to keep swimming:
Sharks lack the swim bladder that most fish use to adjust their buoyancy. Swimming creates lift that prevents sharks from sinking.Sharks, like other marine animals, get their oxygen from the water. Nurse sharks, however, do have mechanisms to move water through their gills, and thus do not need to swim constantly to “breathe,Sharks use a ramjet ventilation system that requires them to swim to force water to the gills. Species that cannot pump water through their gills, they have to constantly swim to be able to breathe.Some sharks must swim constantly in order to keep oxygen-rich water flowing over their gills. This allows them to rest on the sea floor and still breathe. However, Some sharks, such as the tiger shark, can switch between buccal pumping and ram ventilation depending on quickly they're swimming.Carbon dioxide concentration in the water outside their gills increases due to the increased cellular respiration in their muscles.
Sharks have prominent spiracles, or respiratory openings behind the eyes that allow the fish to pull in water while buried under sand. Carbon dioxide waste also passes from the shark's blood and out of its body through the gill tissue.
As water passes over the gill's membranes, tiny blood vessels extract oxygen from the water.