poriferans
1. What are poriferans?
2. What is the way of life of
sponges?
3. What is the typical shape of
poriferans?
4. How does water move
inside sponges? What is the
function of the pores in these
animals?
5. How do sponges try to
protect themselves against
harm from the environment?
Is that method efficient or
rudimentary?
6. What are the main cells of
which poriferans are made?
7. Concerning digestion how
are poriferans characterized?
8. How are animals divided
according to their type of
digestive process?
9. How are gases exchanged
in sponges?
10. Do sponges have nervous,
circulatory and excretory
systems?
11. Is reproduction in sponges
sexual or asexual?
12. What is the evolutionary
advantage of the occurrence
of sperm cells and larval stage
in the lifecycle of sponges?
13. What is the economic
importance of sponges?
14. Sponge identitycard. How
are sponges characterized
according to example of
representingbeings, basic
morphology, type of
symmetry, embryonic (germ)
layers and coelom, digestive
system, respiratory system,
circulatory system, excretory
system, nervous system and
types of reproduction?