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  1. F

    Biology; Chemistry; Physics: Post your doubts here!

    You cannot number outside the grid. Your graph should cover atleast 3/4 of the total space, if not all.
  2. F

    Biology; Chemistry; Physics: Post your doubts here!

    Crushing breaks down the cell membrane of the cells and releases the stored nutrients.
  3. F

    I wanted to test my preparation so i came here. Been here a lurker from along time :p

    I wanted to test my preparation so i came here. Been here a lurker from along time :p
  4. F

    Biology; Chemistry; Physics: Post your doubts here!

    yes. For example in this experiment, the control experiment will have everything same but the alive maggots are replaced by dead maggots. So the dye will not move towards the test tube, hence an opposite result.
  5. F

    Biology; Chemistry; Physics: Post your doubts here!

    It's another version of the experiment with one/two things changing/opposite so that the observation and conclusion of this control experiment are actually opposite/different from the original one.
  6. F

    Biology; Chemistry; Physics: Post your doubts here!

    Here's the diagram if you're wondering. The colored liquid moves towards the test tube.
  7. F

    Biology; Chemistry; Physics: Post your doubts here!

    Not really. Just that they're easily available. I've seen Insect Larvae being used aswell :p
  8. F

    Biology; Chemistry; Physics: Post your doubts here!

    I think you mean used in? You set up a beaker with some snails, a CO2 absorbant (KOH), wire mesh, a tube leading out of the beaker to a capillary tube with a dye in it. As oxygen is used up in beaker, low pressure is created and the dye in the capillary tube moves towards the beaker.
  9. F

    Biology; Chemistry; Physics: Post your doubts here!

    Just praying for the best :D.
  10. F

    Biology; Chemistry; Physics: Post your doubts here!

    There's a reason I used that explanation. Victim :(
  11. F

    Biology; Chemistry; Physics: Post your doubts here!

    When the plant does not receive light, it puts in it's best effort to grow upwards to acquire light. If it's given light from the start, it wont struggle. Sorta like if you dont get grades the first time, you put maximum efforts for next. If you get them the first time, you dont put up that...
  12. F

    Biology; Chemistry; Physics: Post your doubts here!

    Crush a sample of bean seeds in a mortar. Add a few cm^3 of biuret solution(NaOH + CuSO4) to the sample. The blue solution turns violet/purple if protein is present.
  13. F

    Biology; Chemistry; Physics: Post your doubts here!

    In that situation, it's the salivary amylase because we dont use pancreatic for experiments. So neutral is the answer. A control helps us compare our observations and make a conclusion based on that comparsion.
  14. F

    Biology; Chemistry; Physics: Post your doubts here!

    Depends on which amylase you look at. The amylase in mouth works at a pH of 7 as saliva is neutral. The pancreatic amylase is alkalin-ic as it works in the alkaline pancreatic juice.
  15. F

    Biology; Chemistry; Physics: Post your doubts here!

    1) Prepare a control experiment with boiled saliva. 2) Keep the amount of water same in both experiments. 3) The temperature of both experiments should be same.
  16. F

    Biology; Chemistry; Physics: Post your doubts here!

    When you are finding the mean / average you are making your answer accurate, i think.
  17. F

    Biology; Chemistry; Physics: Post your doubts here!

    There is no specific temperature. It will breakdown starch at any temp but the rate will be different. Yes you can say that at 35 it will break maximum starch as it is most reactive at this optimum temperature.
  18. F

    Biology; Chemistry; Physics: Post your doubts here!

    Diffusion and Osmosis Sexual Reproduction in Floweing Plants Microorganism Nutrition and Transport in Plants
  19. F

    Biology; Chemistry; Physics: Post your doubts here!

    Accuracy is the precision of the experiment; how precise it is. Reliability is how right/correct the experiment is? For example if the students conduct the experiment in a wrong manner, their answer is not reliable (it cannot be counted upon for investigation) but they can still improve it's...
  20. F

    Biology; Chemistry; Physics: Post your doubts here!

    Repeat and Average. Draw a Graph. Keep the temperature and other factors (mass, concentration) constant.
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