Do earthworms have radial or bilateral symmetry?
Worms have bilateral symmetry. Worms have cells, tissues, organs, and systems.
What type of symmetry does a dog have?
bilateral symmetry
What is no symmetry?
: not symmetrical : not characterized by symmetry : asymmetrical, unsymmetrical a nonsymmetrical pattern a deer with nonsymmetric antlers The mass of the Moon is distributed in a nonsymmetrical manner, with the center of mass lying 1.8 km closer to the Earth than the geometrical center of figure.— Stuart Ross Taylor.
Which invertebrate has a mantle and a foot?
Mollusks
What is the largest group of animals?
phylum Arthropoda
What do you call the group of marine animals that has full of pores or holes?
The word Porifera means organisms with holes. These are non-motile animals attachedb to some solid support. There are holes or pores all over the body. They are commonly called sponges, and are mainly found in marine habitats.
Which animal group are not living in Marine?
The phylum Echinodermata contains about 6000 species are spiny skinned animals. This phylum exists exclusively in the sea, and cannot be found on land or in fresh water.
Are sponges asexual?
Sponges reproduce by both asexual and sexual means. Once the larvae are in the water column they settle and develop into juvenile sponges. Sponges that reproduce asexually produce buds or, more often, gemmules, which are packets of several cells of various types inside a protective covering.
What are the 3 classes of porifera?
The approximately 5,000 living sponge species are classified in the phylum Porifera, which is composed of three distinct groups, the Hexactinellida (glass sponges), the Demospongia, and the Calcarea (calcareous sponges).
What class is a sponge?
The approximately 8,550 living sponge species are scientifically classified in the phylum Porifera, which is comprised of four distinct classes: the Demospongiae (the most diverse, containing 90 percent of all living sponges), Hexactinellida (the rare glass sponges), Calcarea (calcareous sponges), and Homoscleromorpha …
What are the four classes of sponge?
Calcarea, Hexactinellida, Demospongiae, and Homoscleromorpha make up the four classes of sponges; each type is classified based on the presence or composition of its spicules or spongin.
How do you classify porifera?
The phylum Porifera has four classes, namely the Calcarea, Demospongiae, Hexactinellida and Homoscleromorpha. Exclusively marine, calcareous sponges predominantly inhabit shallow tropical waters. They are often small and delicate, with thin coalescent tubes or a vase-like form.
What makes sponges unique?
Sponges are similar to other animals in that they are multicellular, lack cell walls, and produce sperm cells. Unlike other animals, they lack true tissues and organs, and have no body symmetry. The shapes of their bodies are adapted for efficient water flow through their central cavity.
What is the classification of sycon?
Calcareous sponge