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Most of the oxygen on earth is produced by
Which of the following are longest cells of human body?
Which of the following increase the free surface of the cell to enhance absorption?
Consider the following statements regarding the origin of polyploidy and choose the correct answer: 1. The egg may be fertilized by more than one sperm 2. There may be a failure of mitosis 3. Triploids may arise as a result of fertilization of unreduced gametes 4. An autotetraploid may arise either by the doubling of chromosomes or fertilization between two different gametes
Which one of the following is a plant hormone?