Invertebrates Flashcards
How do sponges get their prey?
By sucking water in.
If a sponge is soft does it contain spicules or spongin? \
What purpose does this substance have?
Spongin, support and protection.
what is the predominant mode of asexual reproduction in a sponge?
Budding
What roles do amoebocytes play in the anatomy of a sponge.
Digestion, carry waste, carry necessary gases, and forming spicules and spongin.
When does a sponge produce gemmules?
In colder weather.
What is the difference between the nematocytes of a hydra and those of a sea anemone?
Hydra- sensory, Sea anemone- chemical
Why do cnidarians not need respiratory or excretory systems?
Because of their thin skin.
Some biology books say jellyfish live dual lives, why?
They start as a polyp and end as a medusa.
If a jellyfish reproduces sexually, what from is it in?
Medusa
what is another name for a a large coral colony?
Coral reef
What benefits do earthworms give the plants in the soil that they inhabit?
Irrigation and fertilization.
If you pick up two earthworms and the first feels very similar near the clitellum and the second does not, what can you conclude about the first earthworm.
It has recently mated.
What similarities exist between the hydras sexual reproduction and the earthworms? what differences exist?
S- they produce both sperm and egg.
D- Hydra can mate with itself but earthworms cannot.
What will happen if a earthworms cuticle gets dry?
They shrivel and die because o2 cannot travel through a dry cuticle.
Why don’t planarians need circulatory systems?
The intestine is so highly branched and is near.
