Long Term Courses

Features of Kshitij Education India’s Live Online Coaching for Board Exams

  • 397 Students score 90% + in CBSE-XII Board 2015
  • 542 Students score 10 CGPA in CBSE-X Board 2015
  • Golden Opportunity for students to be trained by IITians & Doctors
  • Well Structured Time Table
  • Full Course Curriculum covering whole syllabus
  • Regular Doubt Removal Classes
  • Precise Algorithm & Tricks to solve problems quickly will be discussed

Attend Free Demo Class Now

Name
 
Contact Number
 
 
Email ID
 
 
Class
 
City
 
   
09643516426 operations_kei +91 9555288846

REPRODUCTION IN ORGANISMS

Each and every organism can live only for a certain period of time. The period from birth to the natural death of an organism represents its life span. Life spans of a few organisms are given in Figure 1.Several other organisms are drawn for which you should find out their life spans and write in the spaces provided. Examine the life spans of organisms represented in the Figure 1. Isn’t it both interesting and intriguing to note that it may be as short as a few days or as long as a few thousand years? Between these two extremes are the life spans of most other living organisms. You may note that life spans of organisms are not necessarily correlated with their sizes; the sizes of crows and parrots are not very different yet their life spans show a wide difference. Similarly, a mango tree has a much shorter life span as compared to a peepal tree. Whatever be the life span, death of every individual organism is a certainty, i.e., no individual is immortal, except single-celled organisms. Why do we say there is no natural death in single-celled organisms? Given this reality, have you ever wondered how vast number of plant and animal species have existed on earth for several thousands of years? There must be some processes in living organisms that ensure this continuity. Yes, we are talking about reproduction, something that we take for granted.

Approximate life spans of some organisms

Reproduction is defined as a biological process in which an organism gives rise to young ones (offspring) similar to itself. The offspring grow, mature and in turn produce new offspring. Thus, there is a cycle of birth, growth and death. Reproduction enables the continuity of the species, generation after generation.
There is a large diversity in the biological world and each organism has evolved its own mechanism to multiply and produce offspring. The organism’s habitat, its internal physiology and several other factors are collectively responsible for how it reproduces. Based on whether there is participation of one organism or two in the process of reproduction, it is of two types. When offspring is produced by a single parent with or without the involvement of gamete formation, the reproduction is asexual. When two parents (opposite sex) participate in the reproductive process and also involve fusion of male and female gametes, it is called sexual reproduction.

Do you like this Topic?

Share it on


       
       
Online Classroom Program 1 on 1 Online Classes Correspondence Course Best Pool of Faculty Result Oriented Coaching Program

Welcome to Kshitij Education India


Our Guarantee:

We're so sure you'll have the time of your life with us, we back our courses with a 100% Satisfaction Guarantee.

If for any reason you aren't 100% satisfied with your classes in first 7 days, just let us know and we'll refund your fees. No questions asked.

And based on your feedback, we will take the necessary steps to ensure we never repeat any mistakes as such.

Live Chat