Plan an experiment and prepare a flow chart of the steps that you would follow to ensure that the seeds are formed only from the desired sets of pollen grains.Name the type of experiment that you carried out .
( b) Write the importance of such experimets.

Consider the following statements regarding angiosperms and choose combination of correct statement among these. I. As a rule, only one pollen tube is formed from one pollen grain. II. The protoplast of the pollen grain migrates out and position itself at the tip of pollen tube. III. Backward flow of cytoplasm from the tio of the pollen tube towards the microspore is prevented by the formation of callose plugs at intervals. Codes

Read the following statement and answer the questions that follows: "A guava fruit has 200 viable seeds.". a) What are viable seeds? b) Write the total number of: i) Pollen grains , ii) Gametes in producing 200 viable guava seeds. c) Prepare a flow-chart to depict the post-pollination events leading to viablle-seed production in a flowering plant.

Read the following statement and answer the questions that follows: "A guava fruit has 200 viable seeds.". a) What are viable seeds? b) Write the total number of: i) Pollen grains , ii) Gametes in producing 200 viable guava seeds. c) Prepare a flow-chart to depict the post-pollination events leading to viablle-seed production in a flowering plant.

Answer the following questions based on Meselson and Stahl's experiment of E. coli : (a) Write the name of the chemical substance used as the only source of nitrogen in the experiment. (b) Why did they allow the synthesis of the light and the heavy DNA molecules in the organism ? (c ) How did they distinguish the heavy DNA molecules from the light DNA molecules? Explain. (d) Write the conclusion the scientists arrived at, at the end of the experiment.

Answer the following questions based on Meselson and Stahl's experiment of E. coli : (a) Write the name of the chemical substance used as the only source of nitrogen in the experiment. (b) Why did they allow the synthesis of the light and the heavy DNA molecules in the organism ? (c ) How did they distinguish the heavy DNA molecules from the light DNA molecules? Explain. (d) Write the conclusion the scientists arrived at, at the end of the experiment.