Does a sea sponge have appendages?
Table of Contents
Does a sea sponge have appendages?
Sexual reproduction The choanocyte then transforms into an amoeba-shaped cell called a carrier cell, which gives up the spermatozoan to an egg, lying near a chamber formed by choanocytes and containing long lashlike appendages called flagella.
Do porifera have jointed appendages?
The phylum porifera contains the earliest invertebrates: the sponges….Test Your Knowledge.
| Phylum (includes) | Notable Characteristics | Example |
|---|---|---|
| Arthropoda (insects, spiders, crustaceans, centipedes) | segmented body, jointed appendages, exoskeleton, brain | insect (dragonfly) |
How many body parts does a sponge have?
Sponges have a number of specialized cells that carry out distinct functions within the organism, but they do not have true tissues or organs. There are three different body plans found among sponges: asconoid, synconoid, and leuconoid.
How many layers does a sponge have?
two cell
As mentioned above, sponges are diploblasts and consist of essentially two cell layers. Between these two layers there is a gelatinous substance called the mesohyl. This matrix encases the sponge’s skeletal elements as well as scattered amoebocytes.
What appendages do sponges have?
In the body of a sponge, ostia are many while osculum is present as a single opening.
- B. Sponges belong to phylum porifera and are the most primitive of multicellular animals.
- C. Sponges do not have any appendages.
- D.
- Hence, sponges lack appendages.
- So, the correct answer is ‘Appendages’.
How many cells do sponges have?
Sponges are made of four simple and independent cells. The first are the collar cells, which line the canals in the interior of the sponge. Flagella are attached to the ends of the cells and they help pump water through the sponge’s body.