2014年9月23日 · A lophophore is a feeding mechanism found in some aquatic organisms. One member of this group are hard shelled bivalves. These have a lophophore, a crown of tentacles whose cilia create a water current that enables them to filter food particles out of the water. Other types have a lophophore that is a ring of tentacles mounted on a single, retracted stalk. Many fish will not eat these, as they ...

2018年5月13日 · Continental drift led to early geographic isolation of Australia almost 100 million years ago: when only prototherian and metatherian mammals roamed the earth. No eutheria ever evolved in the continent. - Evolutionary history of marsupial mammals in the form of fossils is not consistent, but fossils of such early mammals from mesozoic era are excavated from most parts of the world. Australia ...

2014年8月24日 · First off, let's define what a crustacean is. A crustacean describes animals with segmented bodies.They belong to the same phylum of the animal kingdom as insects and spiders.

2018年3月18日 · It is in the class of Gastropoda. Snails are small, shelled creatures that roam this world. In their scientific classification, they fall under the Animalia kingdom, since they are animals. Since snails are invertebrates, their phylum must also consists of invertebrates, and snails fall into the phylum Mollusca, where organisms have soft bodies, and cover their bodies with a hard, calcium ...

2018年5月25日 · The Wikipedia link for sheep defines them into the following classification:. Kingdom: Animalia Phylum: Chordata ...

2015年5月28日 · What is a lophophore? What is an entoprocta? What is a rotifer? How is the mollusk mantle related to its ...

2014年8月2日 · Crustaceans and Arachnida are classes of Phylum Arthopoda Arthropoda : Animals with jointed legs . Largest phylum . CRUSTACEA : Habitat - Aquatic Body - Differentiated into cephalothorax (head & thorax are fused) & abdomen. + dorsal cuticular plate Carapace ** Appendages - 2 pair of antennae, one pair of mandible and generally two pair of maxillae in head. As many as 5 pair of walking legs ...

2015年9月20日 · They can extract oxygen from the atmosphere in their environment through their skin and also have gills. Amphibians are not necessarily able to survive on land and in water at the same time. During the amphibian life cycle, they might have gills during one stage and not have gills during another. Some might always have gills and be water-bound throughout their entire lives, while others might ...