Q1. What is life span? Ans: Life span is the period from birth to natural death of an organism. Q2. Define clone. Ans: The individuals that are morphologically and genetically similar to the parent are called clone. Q3. Mention the different means/ methods of asexual reproduction with example. Ans:  Cell division – Protista, Monera Binary fission – Amoeba, Paramecium Budding – Yeast Zoospores (microscopic motile endogenous spores) – aquatic fungi, chlamydomonas Conidia (microscopic immotile exogenous spores)- pencillium External buds – hydra Internal buds like gemmules – sponges (spongilla) Q4.Unicellular organisms are immortal. Justify. Ans: Single celled organisms like amoeba & bacteria reproduce by cell division and there is no natural…