ISB 202 11-18-08 - ISB 202 *pheromones-chemical mating...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ISB 202 11-18-08 **pheromones-chemical mating signals Animalia- animals are very important to humans throughout history o General characteristics: Multicelled (all of them) Aerobic Heterotropic- ingest (eat or parasitize) other organisms Reproduce sexually usually (sometimes asexually) Motile at some point of their lives (motile vs. mobile) Symmetry is found in most (not all) bodies Bilateral-identical on both sides (higher animals) Radial- symmetrical around a central axis (starfish) (Lowest forms (e.g., sponges) lack symmetry o Fossil records date to 900 mya o Great diversity-more than 2000000 known species o Invertebrates- no backbones o Vertebrates- have backbones o Just like bacteria, fungi, and protistas some animals are good and some and bad o There are 11 phyla of animals The earliest (placozoa) has only one existing species a simple disk of cells with no mouth and doesn’t bear discussing **Sponges- no tissues, no organs, no symmetry
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

ISB 202 11-18-08 - ISB 202 *pheromones-chemical mating...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online