HELPP RED CELERY EXPERIMENT

A hypothesis is a reasonable, or educated, guess that could solve the scientist's problem. I know that non-scientific people have a circulatory system that carries food to every cell of the body. My hypothesis is that plants have a special pipeline that carries water from the roots to every cell in the plant.

A scientist must have evidence to support or to deny his or her hypothesis. To obtain this evidence, a scientist must test his or her hypothesis. The test of a hypothesis is called an experiment. An experiment produces results that are compared to the hypothesis to determine whether the hypothesis is correct. I shall conduct my experiment in a laboratory and observe the result. To test my hypothesis, I shall put celery in a half a glass of water colored with red food coloring.

Try this investigation to see if your experiment proves John's hypothesis.

Compile a summary of your findings from this investigation. Be sure to include answers to the questions below as well as your own data and reflections.

Describe your method in going about this investigation.

What was your hypothesis? Was it proven to be true?

Describe the cross-section of celery. Did it look the way you expected it to?

Which parts of the stem have the most food coloring?

Did the cross-section of the celery look the same as the bottom of the stalk?

Did your data agree with John's results?

What did you find out from this experiment? Be thoughtful in your answer.

Rease is an enzyme used by plants to break down urea (a nitrogen-containing compound) into carbon dioxide and ammonia. urease urea > > > carbon dioxide and ammonia ammonia is broken down by plants into a nitrogen source plants need to grow. thus, plants could not use urea as a nitrogen source unless it was first converted to ammonia. in soybean plants there are two different kinds of urease, one produced in the seeds and the other produced in the leaves of the plant. three types of soybean plants were used in a set of experiments: normal soybeans and two mutant strains, one lacking the urease in the seeds only (strain 1) and one lacking urease in the leaves only (strain 2). experiment 1 separate areas in a field were planted with normal, strain 1, and strain 2 soybeans. all types of soybeans appeared to grow, flower, and produce seeds equally well. there were no externally detectable differences among the strains. experiment 2 small pieces of plant leaves of equal weight were obtained from each type of soybean plant and separately placed on media in culture dishes. tissue growing in this way will become an unorganized clump of cells referred to as callus. to provide a controlled nitrogen source, half the tissue samples of each type were placed on media containing urea, and the other half of the samples were placed on media containing ammonia. after 30 days, the weight gain for each of the callus samples was determined. results are shown in the table below.