{"id":4484,"date":"2025-06-01T15:36:08","date_gmt":"2025-06-01T15:36:08","guid":{"rendered":"https:\/\/diznr.com\/?p=4484"},"modified":"2025-06-01T15:36:08","modified_gmt":"2025-06-01T15:36:08","slug":"biology-reproduction-in-organism-life-span-part-2","status":"publish","type":"post","link":"https:\/\/www.reilsolar.com\/pdf\/biology-reproduction-in-organism-life-span-part-2\/","title":{"rendered":"BIOLOGY- REPRODUCTION IN ORGANISM LIFE SPAN Part 2."},"content":{"rendered":"<p>BIOLOGY- REPRODUCTION IN ORGANISM LIFE SPAN Part 2.<\/p>\n<p>[fvplayer id=&#8221;793&#8243;]]<\/p>\n<p data-start=\"0\" data-end=\"71\">Here\u2019s <strong data-start=\"7\" data-end=\"69\">Part 2: Life Span in Organisms (Reproduction in Organisms)<\/strong><\/p>\n<h3 data-start=\"78\" data-end=\"109\"><strong data-start=\"81\" data-end=\"107\">LIFE SPAN OF ORGANISMS<\/strong><\/h3>\n<h3 data-start=\"111\" data-end=\"139\"><strong data-start=\"115\" data-end=\"137\">What is Life Span?<\/strong><\/h3>\n<p data-start=\"140\" data-end=\"268\">The <strong data-start=\"144\" data-end=\"157\">life span<\/strong> of an organism is the period from its birth to its natural death. It varies greatly among different species.<\/p>\n<h3 data-start=\"270\" data-end=\"312\"><strong data-start=\"274\" data-end=\"310\">Life Span of Different Organisms<\/strong><\/h3>\n<ul data-start=\"313\" data-end=\"686\">\n<li data-start=\"313\" data-end=\"408\"><strong data-start=\"315\" data-end=\"340\">Short-lived organisms<\/strong>:\n<ul data-start=\"346\" data-end=\"408\">\n<li data-start=\"346\" data-end=\"371\">Mayfly \u2013 <strong data-start=\"360\" data-end=\"369\">1 day<\/strong><\/li>\n<li data-start=\"374\" data-end=\"408\">Rice plant\u00a0 \u2013 <strong data-start=\"392\" data-end=\"406\">3-4 months<\/strong><\/li>\n<\/ul>\n<\/li>\n<li data-start=\"409\" data-end=\"498\"><strong data-start=\"411\" data-end=\"433\">Moderate life span<\/strong>:\n<ul data-start=\"439\" data-end=\"498\">\n<li data-start=\"439\" data-end=\"467\">Dog\u00a0 \u2013 <strong data-start=\"450\" data-end=\"465\">10-15 years<\/strong><\/li>\n<li data-start=\"470\" data-end=\"498\">Cow\u00a0 \u2013 <strong data-start=\"481\" data-end=\"496\">20-25 years<\/strong><\/li>\n<\/ul>\n<\/li>\n<li data-start=\"499\" data-end=\"686\"><strong data-start=\"501\" data-end=\"525\">Long-lived organisms<\/strong>:\n<ul data-start=\"531\" data-end=\"686\">\n<li data-start=\"531\" data-end=\"564\">Elephant\u00a0 \u2013 <strong data-start=\"547\" data-end=\"562\">60-70 years<\/strong><\/li>\n<li data-start=\"567\" data-end=\"607\">Human\u00a0 \u2013 <strong data-start=\"589\" data-end=\"605\">80-100 years<\/strong><\/li>\n<li data-start=\"610\" data-end=\"648\">Banyan tree\u00a0 \u2013 <strong data-start=\"629\" data-end=\"646\">200-500 years<\/strong><\/li>\n<li data-start=\"651\" data-end=\"686\">Tortoise\u00a0 \u2013 <strong data-start=\"667\" data-end=\"684\">100-250 years<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3 data-start=\"688\" data-end=\"716\"><strong data-start=\"692\" data-end=\"714\">Life Span vs. Size<\/strong><\/h3>\n<ul data-start=\"717\" data-end=\"897\">\n<li data-start=\"717\" data-end=\"897\">Life span is <strong data-start=\"732\" data-end=\"759\">not necessarily related<\/strong> to the size of an organism.\n<ul data-start=\"792\" data-end=\"897\">\n<li data-start=\"792\" data-end=\"897\">Example: A <strong data-start=\"805\" data-end=\"827\">parrot (140 years)<\/strong> lives longer than a <strong data-start=\"848\" data-end=\"867\">crow (15 years)<\/strong> despite similar body sizes.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3 data-start=\"899\" data-end=\"952\"><strong data-start=\"903\" data-end=\"950\">Connection Between Life Span &amp; Reproduction<\/strong><\/h3>\n<ul data-start=\"953\" data-end=\"1173\">\n<li data-start=\"953\" data-end=\"1056\">Every organism has a <strong data-start=\"976\" data-end=\"997\">limited life span<\/strong>, but reproduction ensures the <strong data-start=\"1028\" data-end=\"1053\">continuity of species<\/strong>.<\/li>\n<li data-start=\"1057\" data-end=\"1173\"><strong data-start=\"1059\" data-end=\"1088\">No individual is immortal<\/strong>, except for some unicellular organisms like <strong data-start=\"1133\" data-end=\"1143\">Amoeba<\/strong>, which divide continuously.<\/li>\n<\/ul>\n<p data-start=\"1175\" data-end=\"1246\" data-is-last-node=\"\" data-is-only-node=\"\">Would you like me to continue with <strong data-start=\"1210\" data-end=\"1243\">Part 3: Asexual Reproduction?<\/strong><\/p>\n<h3 data-start=\"1175\" data-end=\"1246\"><a href=\"https:\/\/unacademy.com\/content\/wp-content\/uploads\/sites\/2\/2022\/10\/Reproduction-in-organisms.pdf\" target=\"_blank\" rel=\"noopener\">BIOLOGY- REPRODUCTION IN ORGANISM LIFE SPAN Part 2.<\/a><\/h3>\n<h3 class=\"LC20lb MBeuO DKV0Md\"><a href=\"https:\/\/mpchsschool.in\/wp-content\/uploads\/2020\/07\/Botany-Reproduction-in-Organisms.pdf\" target=\"_blank\" rel=\"noopener\">Year Science \u2013 Botany Unit \u2013 1 Reproduction in Organisms<\/a><\/h3>\n<h3 class=\"LC20lb MBeuO DKV0Md\"><a href=\"https:\/\/d2n7zouke881gi.cloudfront.net\/Class+12+Notes\/Biology\/pdf\/12_biology_notes_ch01_reproductions_in_organisms.pdf\" target=\"_blank\" rel=\"noopener\">CBSE Class 12 Biology &#8211; cloudfront.net<\/a><\/h3>\n<h3 class=\"LC20lb MBeuO DKV0Md\"><a href=\"https:\/\/ncert.nic.in\/pdf\/publication\/exemplarproblem\/classXII\/biology\/leep401.pdf\" target=\"_blank\" rel=\"noopener\">REPRODUCTION IN ORGANISMS<\/a><\/h3>\n<h3 class=\"LC20lb MBeuO DKV0Md\"><a href=\"https:\/\/ncert.nic.in\/textbook\/pdf\/lebo102.pdf\" target=\"_blank\" rel=\"noopener\">Chapter 2-Human Reproduction<\/a><\/h3>\n<h3 class=\"LC20lb MBeuO DKV0Md\"><a href=\"https:\/\/www.drishtiias.com\/images\/pdf\/NCERT-Class-12-Biology.pdf\" target=\"_blank\" rel=\"noopener\">NCERT-Class-12-Biology.pdf<\/a><\/h3>\n<p>Certainly! Here&#8217;s <strong>Part 2<\/strong> of your Biology notes on <strong>&#8220;Reproduction in Organisms&#8221;<\/strong>, focusing on the <strong>Life Span<\/strong> concept. It&#8217;s ideal for <strong>Class 12, NEET, and foundational understanding<\/strong>.<\/p>\n<hr \/>\n<h1>\ud83e\uddec BIOLOGY \u2013 <strong>Reproduction in Organisms<\/strong><\/h1>\n<h2>\ud83d\udcd7 Part 2: <strong>Life Span<\/strong><\/h2>\n<hr \/>\n<h2>\ud83d\udd39 <strong>What is Life Span?<\/strong><\/h2>\n<blockquote><p>The <strong>life span<\/strong> of an organism is the <strong>period from birth to the natural death<\/strong> of that organism.<\/p><\/blockquote>\n<p>It is <strong>not necessarily related to size or complexity<\/strong>. For example, some insects may live only for <strong>a few days<\/strong>, while some large trees can live for <strong>thousands of years<\/strong>.<\/p>\n<hr \/>\n<h2>\ud83d\udccc <strong>Key Features of Life Span<\/strong><\/h2>\n<ul>\n<li>Every organism has a <strong>definite life span<\/strong>.<\/li>\n<li><strong>Different species<\/strong> have different life spans.<\/li>\n<li>It does <strong>not correlate directly<\/strong> with body size or intelligence.<\/li>\n<\/ul>\n<hr \/>\n<h2>\ud83e\udded <strong>Examples of Life Span in Various Organisms:<\/strong><\/h2>\n<table>\n<thead>\n<tr>\n<th>Organism<\/th>\n<th>Approximate Life Span<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Mayfly<\/td>\n<td>1 day<\/td>\n<\/tr>\n<tr>\n<td>Rice Plant<\/td>\n<td>3\u20134 months<\/td>\n<\/tr>\n<tr>\n<td>Dog<\/td>\n<td>10\u201313 years<\/td>\n<\/tr>\n<tr>\n<td>Crow<\/td>\n<td>15 years<\/td>\n<\/tr>\n<tr>\n<td>Horse<\/td>\n<td>25\u201330 years<\/td>\n<\/tr>\n<tr>\n<td>Elephant<\/td>\n<td>60\u201370 years<\/td>\n<\/tr>\n<tr>\n<td>Parrot<\/td>\n<td>140 years<\/td>\n<\/tr>\n<tr>\n<td>Tortoise<\/td>\n<td>100\u2013150 years<\/td>\n<\/tr>\n<tr>\n<td>Banyan Tree<\/td>\n<td>Over 200 years<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>\ud83c\udf31 <strong>Important Concepts Related to Life Span<\/strong><\/h2>\n<h3>1\ufe0f\u20e3 <strong>Mortality:<\/strong><\/h3>\n<ul>\n<li><strong>Death<\/strong> is the final event of the life span.<\/li>\n<li>Natural and inevitable for all living beings.<\/li>\n<\/ul>\n<h3>2\ufe0f\u20e3 <strong>Reproduction Phase:<\/strong><\/h3>\n<ul>\n<li>Organisms generally reproduce during the <strong>mature phase<\/strong> of their life span.<\/li>\n<\/ul>\n<h3>3\ufe0f\u20e3 <strong>Biological Immortality (Rare Cases):<\/strong><\/h3>\n<ul>\n<li>Some organisms like <strong>Hydra<\/strong> and <strong>Planaria<\/strong> show signs of <strong>regeneration<\/strong> and are said to be <strong>biologically immortal<\/strong>, though they still die due to external factors.<\/li>\n<\/ul>\n<hr \/>\n<h2>\ud83d\udd2c NEET MCQ Practice:<\/h2>\n<p><strong>Q:<\/strong> Which of the following organisms has the shortest life span?<br \/>\nA) Crow<br \/>\nB) Rice Plant<br \/>\nC) Mayfly<br \/>\nD) Dog<\/p>\n<p>\u2705 <strong>Answer:<\/strong> <strong>C) Mayfly<\/strong><\/p>\n<hr \/>\n<h2>\ud83e\udde0 Quick Recap:<\/h2>\n<ul>\n<li><strong>Life span<\/strong> = Birth \u279d Growth \u279d Maturity \u279d Ageing \u279d Death<\/li>\n<li>It <strong>varies greatly<\/strong> between species.<\/li>\n<li>Reproduction ensures <strong>continuity of species<\/strong>, even though individual life ends.<\/li>\n<\/ul>\n<hr \/>\n<p>Would you like:<\/p>\n<ul>\n<li>\ud83d\uddbc\ufe0f A visual chart of organism life spans?<\/li>\n<li>\ud83d\udcc4 PDF revision notes for this chapter?<\/li>\n<li>\ud83e\uddea Quiz or worksheet for self-practice?<\/li>\n<\/ul>\n<p>Let me know, and I\u2019ll prepare those for you!<\/p>\n<h3><a href=\"https:\/\/www.ssgopalganj.in\/online\/Class%20XII\/Bio\/ch1.pdf\" target=\"_blank\" rel=\"noopener\">BIOLOGY- REPRODUCTION IN ORGANISM LIFE SPAN Part 2.<\/a><\/h3>\n","protected":false},"excerpt":{"rendered":"<p>BIOLOGY- REPRODUCTION IN ORGANISM LIFE SPAN Part 2. [fvplayer id=&#8221;793&#8243;]] Here\u2019s Part 2: Life Span in Organisms (Reproduction in Organisms) LIFE SPAN OF ORGANISMS What is Life Span? The life span of an organism is the period from its birth to its natural death. It varies greatly among different species. Life Span of Different Organisms [&hellip;]<\/p>\n","protected":false},"author":64,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101,102],"tags":[],"class_list":["post-4484","post","type-post","status-publish","format-standard","hentry","category-class-11-and-12-biology","category-iit-neet-biology"],"_links":{"self":[{"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/posts\/4484","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/users\/64"}],"replies":[{"embeddable":true,"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/comments?post=4484"}],"version-history":[{"count":0,"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/posts\/4484\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/media?parent=4484"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/categories?post=4484"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/tags?post=4484"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}