Monday, 5 December 2011

Introduction to Animals

The characteristics of Animals are:
  • Heterotrophic, which means consuming food  (ingesting food)
  • Primarily diploid - A cell/organism containing two sets of chromosomes.
  • Sexual reproduction - Two individuals produce an offspring that has genetic characteristics from both parents.
  • Embryonic development: Zygote --> blastula --> gastrula

Animals are eukaryotic multicellular organisms composed of cells that don't have walls. Animals are either invertebrates or vertebrates. Invertebrate means without backbone. Examples are: Phyla porifera (sponge), Cnideria, Platyheiminthes, Nematoda, Annelida, Mollusa, Arthopoda, Echinodermata. Vertebrates are animals with backbones.  

No comments:

Post a Comment