a) What is the aim of the experiment? b) What is the purpose of beaker B. c) Draw the diagram of Beaker'A' as it would appear after a few days. D) would the result be same if instead of dried peas, peas that have been killed by heating in an oven are used? (Biology)
Answers
Temperature is one of the most important physical variables that is used to control physical, biological and chemical experiments. A common requirement in a laboratory experiment is the need to heat a sample. Several pieces of equipment can do this, including the Bunsen burner, laboratory oven, hot plate and incubator
Answer:
EXPERIMENT TO PROVE OXYGEN IS NECESSARY FOR GERMINATION - DEFINITION
Aim: To prove that oxygen is necessary for germination.
Apparatus: Two conical flask marked A and B, seeds of pea, water, cotton wool, pyrogallic acid, test tubes.
Procedure: Take two conical flask with a cork and mark them A and B respectively.Place a wet cotton wool in each flask with some soaked Pea seeds. Pyrogallic acid absorbs oxygen so a test tube of in flask B in such a way that the cemical dosent drop in the flask. In flask A hang a test tube of plain water.
Observation: The seeds in flask A germinate because of presence of oxygen and seeds in flask B do not germinate because pyrogallic acid absorbs oxygen.
Result: Oxygen is necessary for germination.