Simple Animals Flashcards
1
Q
How do sponges feed?
A
Sponges are filter feeders,
Water enters through the ostia into the central cavity, the atrium, and is expelled through the osculum
2
Q
What is the difference between polyps and medusae?
A
polyps (corals) is an attached tubular form of cnidarian. Medusae (jellyfish) is a free floating, bell shaped form of a cnidarian.
3
Q
Why are some cnidarians important for humans?
A
Coral reefs are an important food source, contribute to tourism and help with erosion/storm protection
4
Q
What is cephalisation?
A
A tendency in the development of animals to localization of important organs or parts in or near the head.
