Anamalia

Question 1

What are characteristics of animals?

Answer 1

Multicellular, eukaryotic, heterotophic, sexual and asexual reproduction, all move, all hv organs which respond to external stimuli

Question 2

What are the ways we can classify them? Describe them.

Answer 2

Skeletal structures:
- vertebrates, animals w a backbone eg frogs and humans
- invertebrates: animals w no backbone, worm, spider, sea star
Symmetry:
Radically 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 arterial eg humans, lobsters

Question 3

What are the modes of reproduction?

Answer 3

Asexual: fragmentation
Asexual: budding
Sexual: fertilization and zygote formation

Question 4

What’s a zygote?

Answer 4

When the sperm and egg meet it forms a zygote, however when mitosis starts it’s an embryo

Question 5

Describe fragmentation

Answer 5

Asexual, you can cut the organism anywhere/ it breaks off anywhere and forms a new individual. Eg hydra

Question 6

Describe budding

Answer 6

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

Question 7

Describe fertilization and zygote formation

Answer 7

Sexual, sperm fertilizes egg to produce zygote, zygote undergoes mitosis until fully formed organism is complete.