Animals

• Are animals eukaryotic or prokaryotic?

  Eukaryotic
• Are Animals Multicellular or Unicellular?

  Multicellular
• Are animals heterotrophs or autotrophs?

  Heterotrophs
• Do animals have a cell wall?

  No
• What does an animal do that a plant can't?

  Move
• Animals reproduce sexually right? With what stage?

  Yes, with a dominant diploid stage.
• What is a Eukaryote?

  cell that has a nucleus
• What distinguishes animals as Multicellular?

  Multiple cells
• What is a Heterotroph?

  An organism that obtains its energy by consuming other organisms.
• What is a dominant diploid stage in sexual reproduction in animals?

  A dominant diploid stage involves the fusion of gametes from two individuals to produce offspring.
• What is the difference between haploid and diploid?

  Haploid refers to having one set of chromosomes, while diploid refers to having two sets of chromosomes.
• What is the most common ancestor to all animal species?

  Choanoflagellates.
• How long ago did choanoflagellates exist?

  770 million years ago
• Around 700 million years ago the emergence of what animal specifically occurred?

  Sponges
• Where did sponges originate from?

  Sponges originate from choanoflagellates which later generated all the other animals.
• What evidenced the emergence of animals?

  Fossils which mainly consisted of soft-bodied animals.
• When fossils were discovered, evidencing the emergence of animals, what happened 530 million years ago?

  The Cambrian Explosion happened
• What is the Cambrian Explosion?

  It is where most of the major animal groups started to appear in the fossil record, a time of rapid expansion of different forms of life on Earth.
• The Cambrian Explosion

  Increase in diversity especially bilaterian organisms
• What are bilaterian organisms?

  They are organisms with bilateral symmetry
• What is bilateral symmetry?

  When the body plan of an animals can be divided along a line that separates the animal's body intro right and left halves that are nearly identical of each other.
• What may have caused the Cambrian Explosion?

  • possibly because an "arms race"
  • increased atmospheric Oxygen
  • or Hox Genes which just made it easier for animals to evolve new forms