Please help biology question?

Question

PLEASE HELP ME
jeff"s family planned to attend his brother"s basketball game on a school night His mother cooked spaghetti sauce jeff offered to make the salad and cook the spaghetti first jeff washed the lettuce then he sliced tomatoes cucumbers and radishes next jeff put some peper herbs oil and vinegar on the vegetable finally he tossed the salad covered it and place it in the refrigerator jeff read the directions for cooking a pound spaghetti into boiling water and waited while it cooked almost all the water in the pot was gone . jeff took the salad from the refrigerator the vegetable were no longer crisp there was more liquid in the salad bowl tha he have added .
1)what happens when the number of water molecules is greater inside a cell than outside?
2)how does your answer to number 2 help to explain what happened to the vegetables in the salad?
3)When jeff put dry spaghetti into boiling water , was there more water inside or outside the food?
4)what happens when the numbe

4)what happens when the number of water molecules is greater in one area than another are ?

Answer 1

1. The question is ambiguous.

Here's the answer your teacher wants:
If the concentration of solutes is greater outside the cell, then water will leave the cell, and the cell will "shrink."

Here's the real answer:
If you suspend a cell in a very small volume of isotonic solution, the cell will experience no net change, although there are more water molecules inside the cell than outside.
Your teacher sucks.

2. I hypothesize that the pepper, herbs, oil, and vinegar contained a greater concentration of solutes than the lettuce and vegetables. Water left the lettuce and vegetables, due to osmotic pressure and the semi-permeability of the cells of the vegetables. The cells in the lettuce and vegetables became less turgid, and thus had the wilted appearance.

3. More water outside the spaghetti, but as I said before, that's irrelevant. We're looking for the concentration of solutes. The spaghetti has a higher concentration of solutes than the water around it.

4. Again, the number of water molecules is irrelevant, and your teacher still sucks. Water will move from a "higher concentration of water" toward a "lower concentration of water," or, more practically, water will move toward a greater concentration of solutes.

Answer 2

1) Osmosis is the process by which water moves from a greater to a lesser concentration across a cell membrane. It occurs spontaneusly anytime there is a difference in concentration of water molecules across a permeable membrane.

Assuming the text actually reads "how does your answer to number 1 help explain what happened to the vegatables in the salad", the answer to #2 should be readily explainable by considering the process of osmosis. Remember that water will always travel across cell membranes, from the place with a higher concntration to the place with a lower concentration. Osmosis will continue to occur until the water on both side of the cell (inside and outside) is at the same concentration.

Same with the spaghetti. It's very dry when in the box- there's almost no water inside the cells that make up the pasta (mostly wheat cells) because it's been dried out fr a long time. When put into the water, the very dry weat cells absorb some of the water through the process of osmosis.

Just remember that Osmosis always happens anytime you have a difference in water on two sides of a cell membrane and you should be able to trace where the water is going- from the side with more water to the side with less water. Osmotic water is always simply trying to even out the diference in concentrations across the cel membrane.

Answer 3

The water in the leaf is pulled out into the dressing across the cell membranes. It goes from an area of high water content to an area of low water content. This is osmosis.
The plant cell placed in contact with a concentrated salt (hypertonic) solution loses water. The lost turgor pressure makes it flaccid, wilted.

The spaghetti is dry so it rehydrates, absorbs water, as it cooks.

Answer 4

1 - less outside, so water from the cell leaves the cell and moves to an area of lower concentration
2 -the oil and vinegar are more concentrated, so water moves from cells to outside, so the salad and vegetables become less crisp
3 - water moves into the food
4- don't understand????

Answer 5

Osmosis. The water will move in/out until the molecular distribution is even. Obviously there was more water outside of the SPAGHEHTTI but that was a trick question. You asked about the "food"!