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facilitated diffusion

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Which property of water is probably most important for the functioning of organisms at the molecular level?

The property of water that is probably most important for the functioning of organisms at the molecular level is its high specific heat capacity. This allows water to absorb and release a large amount of heat with minimal change in temperature, making it an effective regulator of temperature in living organisms and maintaining stable internal temperatures.


How are veins and arteries like xylem and phloem in plants?

They are not very similar at all! The phloem vessels are most similar because the are alive and the run all the up and down the plant transporting substances other than water. The xylem vessels are really not very similar as they are lignafied (and therefore dead) they are woody and transport water from the roots. The arteries are probably most similar as they do not transport blood under high pressure, like the veins.


What type of Transport in a cell does not require energy?

Passive transport does not require energy as it relies on the natural movement of molecules from an area of high concentration to an area of low concentration. Examples include diffusion, osmosis, and facilitated diffusion.


In this experiment there was a positive sucrose uptake Sucrose probably entered the cells by what means?

Sucrose likely entered the cells through a process called facilitated diffusion, which involves the use of specific carrier proteins to transport the molecule across the cell membrane. The carrier proteins help move the sucrose down its concentration gradient into the cells without requiring energy input from the cell.


Large numbers of which organelle would be present in a cell that actively transports a lot of glucose across its membrane?

Active transport requires energy. Energy is released as a result of respiration, and respiration takes place in mitochondria. So major sites of active transport, such as kidney nephrons and villi in the small intestine need relatively large number of these organelles.