) Some students investigated the effect of the different concentrations of sugar in four drinks, A, B, C and D, on the movement of water across a partially permeable membrane. The students: • made four bags from artificial partially permeable membrane • put equal volumes of 5% sugar solution in each bag • weighed each bag containing the sugar solution • placed one bag in each of the drinks, A, B, C and D • after 20 minutes removed the bags containing the sugar solution and weighed them again. (i) The bag in drink A got heavier after 20 minutes. Explain why. A contains 0.1% sugar solution.
B contains 4.2% sugar solution.
C contains 6.9% sugar solution.
D contains 10.6% sugar solution.

Concentration of sugar in the bag was higher than in the drink or higher concentration of water outside the bag or in the drink boiling tube so water moved in (to the tubing by osmosis.

Explanation:

Concentration of sugar in the bag was higher than in the drink or higher concentration of water outside the bag or in the drink boiling tube so water moved in (to the tubing by osmosis.

the transfer of energy between two molecules spaced just nanometers apart plays a key role in many technologies, including photovoltaics, quantum information systems, lighting, and sensors, as well as in biophysics to measure nanometer distances and in photosynthesis. but an open question in this area is what effect, if any, the surrounding photonic environment has on this nanoscale energy transfer. by designing and performing a carefully controlled experiment to answer this question, scientists have settled the debate and found clues to improving the efficiency of many of the technologies that rely on this process.

explanation:

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.