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PinkMonkey Online Study Guide-Biology


24.0 Introduction

Organisms have a varied life span varying from a few hours to many years.  Each organism undergoes a life-cycle from the time of its formation, either from one or two parents, until its death.

Reproduction is a characteristic of all living forms that results in the continuity of life from one generation to another.  Reproduction is not only a means of continuity for the species, it is also a process concerned with maintenance of the species.  

There are two main types of reproduction:  

(1) Asexual reproduction is a rapid method, involves a single parent and is a characteristic of some plants and simple animals.  The offsprings have identical inherit characteristics from the parent.  

(2) Sexual reproduction is a slower method, involving two parents, and the offsprings share hereditary characteristics of both parents. The reproduction involves the fusion of nuclei of specialized sex cells called gametes (sperm and egg), leading to the formation of zygote or fertilized egg.

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Table of Contents

24.0 Introduction
24.1 Human reproduction
24.2 Female reproductive cycle
24.3 Embryonic Development

Chapter 25


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