The below mentioned article provides a note on pollen-pistil interaction. It is an essential step of fertilisation of angiosperms. It determines compatibility and incompatibility. This interaction have been studied at a molecular and cellular level in relatively few families. It is a dynamic process involving pollen recognition followed by inhibition or promotion of pollen. The events from the deposition of [...]
The following points highlight the five important drugs that are obtained from plants. The important drugs are: 1. Opioids 2. Cannabinoids 3. Coca Alkaloid or Cocaine 4. Hallucinogens 5. Tobacco. Drug # 1. Opioids: Opioids or opiates are drugs that bind to opioid receptors present in human central nervous system and gastrointestinal tract. These have narcotic, analgesic, sedative and astringent [...]
The below mentioned article includes a list of four simple experiments on osmosis. 1. Experiment to demonstrate the osmosis by using sheet of cellophane or goat bladder: Requirements: Beaker, thistle funnel, goat bladder or sheet of cellophane, thread, water and sugar solution. Method: 1. Cover the lower opening of the glass tube with the goat bladder or sheet of cellophane [...]