Answer:
True
Explanation:
The process whereby ions such as sodium and potassium are passed across cell membrane in human cells is known as membrane transport system. This process is regulated by a series of mechanism which involves the creation of electrochemical gradients across the plasma membrane of the cells. The membrane transport system is powered by energy in form of ATP. The three major electron transport system in humans are passive transport (diffusion), osmosis and facilitated diffusion.
There are lot of different pollutants that are putting the well being of the Earth's spheres in danger. These pollutants come mostly from the human activities. It may look as a simple solution to just through all the pollutants in the ocean and dissolve them in it, but it doesn't work that way. If something like this is done, it will cause an ecological disaster. The pollutants will change the composition of the water, with lot of toxic chemicals included, which will result in mass extinction of the marine organisms. The change of the water composition will also lead to changes in its properties and behavior, so it will affect the ocean currents, as well as the climate patterns around the globe.
Answer: D
Explanation: Maintaining a watch for at least a half hour after completion of welding operations is not a responsibility of a fire watch.
A fire watch has the responsibility of detecting fires early so that they can be extinguished quickly thus preventing or minimizing damages to land and property. They are familiar with alarms systems and procedures, maintaining fire fighting equipment and also trained in their use.
Fire watches are often employed in forested areas with risk of fires (high) or in industrial settings where hot work is occurring such as welding or metal grinding.
The whole system is the answer
Answer:
Iceland was not considered as a wasteland by the Vikings that settled in, but the name was given on purpose so that they avoid competition for it.
Explanation:
The Vikings were the first people to reach Iceland. They traveled from their homeland in Scandinavia into the unknown ocean water and eventually managed to reach a large island. Once they got to the island, they made it their base, but also sent expeditions further west, reaching Greenland, and even the North American mainland.
Being aware that there are other groups of Vikings waiting to set sail westward, the first group decided to trick them in order to get better land for themselves. This was done by naming the two large islands they discovered. The green and much more suitable for a living have been named Iceland, while the one covered with ice and much harsher was named Greenland. This made the later groups of Vikings think that Greenland is the better option and they got tricked. Iceland was not a wasteland by any means. It had a lot of timber, freshwater, and an abundance of fish and marine mammals as a food source.
