Alien Body Systems

Lesson 11

Reproduction

     On earth, many multicellular animals reproduce by starting off their children as a single cell which contains chromosomes from both the mother and the father. There are many ways of getting the parents' chromosomes together, and many ways of protecting and nurturing the fertilized egg cell and the organism that is developing from it.   

The snorvep uses a method common to many animals that reproduce in water. The mother lays eggs in the water and the father fertilizes them there. Both genders have organs that produce the reproductive cells, which are released through the end of the digestive tract. The organ that makes the reproductive cells is shown in the diagram in blue.

    baby snorvep

Snorveps lay their eggs in shallow ponds. The young that emerge are very tiny -- and vulnerable to many predators. They swim, eating tiny water animals, for about eight earth months: by this time they weigh about a pound. During this time the parents guard the pond, contribute to the food available to the young, and encourage them to come onto the land. However, many of the small, fragile, and delicate young do not survive. After they have energed from the water and begin to forage on land, the adult snorveps welcome them into the community and begin their educations.

 


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Systems: Digestion, Reproduction, Respiration, Circulation, the Skeletal and the Nervous System

© 1999. Elizabeth Anne Viau. All rights reserved. This material may be used by individuals for instructional purposes but not sold. Please inform the author if you use it at eviau@earthlink.net