Anamalia Flashcards
What are characteristics of animals?
Multicellular, eukaryotic, heterotophic, sexual and asexual reproduction, all move, all hv organs which respond to external stimuli
What are the ways we can classify them? Describe them.
Skeletal structures:
- vertebrates, animals w a backbone eg frogs and humans
- invertebrates: animals w no backbone, worm, spider, sea star
Symmetry:
Radially symmetry: organisms are more primitive, when cut anywhere in half from top to bottom they are the same eg starfish
Bilateral symmetry: more complex, cut in half down the middle are halves the same eg humans, lobsters
What are the modes of reproduction?
Asexual: fragmentation
Asexual: budding
Sexual: fertilization and zygote formation
What’s a zygote?
When the sperm and egg meet it forms a zygote, however when mitosis starts it’s an embryo
Describe fragmentation
Asexual, you can cut the organism anywhere/ it breaks off anywhere and forms a new individual. Eg hydra
Describe budding
Asexual, new organism develops from outgrowth or bud due to cell division at site. Too many are made so it buds off, eg adult jellyfish, coral
Describe fertilization and zygote formation
Sexual, sperm fertilizes egg to produce zygote, zygote undergoes mitosis until fully formed organism is complete.