Brachiopods (/ ˈ b r æ k i oʊ ˌ p ɒ d /), phylum Brachiopoda, are a phylum of trochozoan animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs.Brachiopod valves are hinged at the rear end, while the front can be opened for feeding or closed for protection. Two major categories are traditionally …

In biology, a kingdom (Latin: regnum, plural regna) is the second highest taxonomic rank, just below domain.Kingdoms are divided into smaller groups called phyla.. Traditionally, some textbooks from the United States and Canada used a system of six kingdoms (Animalia, Plantae, Fungi, Protista, Archaea/Archaebacteria, and Bacteria/Eubacteria) while textbooks in Great …

1. Both protostomes and deuterostomes are a part of the group Bilateria. 2. Both of these deuterostomes and protostomes are the classifications used for complex animals. 3. Both contain a true coelom and are hence called the coelomates. 4. both the groups can develop a completely functioning alimentary canal

Al­though males do not di­rectly pro­vide care for the young in a pride, they are im­por­tant in the pro­tec­tion of the cubs from rival males. So long as a male main­tains con­trol over a pride, pre­vent­ing an­other male from tak­ing over, the cubs he has sired are at lower risk of in­fan­ti­cide. (Packer and Pusey, 2001)

Marine life, sea life, or ocean life is the plants, animals and other organisms that live in the salt water of seas or oceans, or the brackish water of coastal estuaries.At a fundamental level, marine life affects the nature of the planet. Marine organisms, mostly microorganisms, produce oxygen and sequester carbon.Marine life in part shape and protect shorelines, and some marine …

The pycnodonts were a diverse group of ray-finned fish that were found in shallow coastal waters from the late Triassic to the late Eocene (~215-37 million years ago). They usually had deep but very narrow body shapes with a disc-like appearance, convergently similar to modern reef fish like marine angelfish or butterflyfish – but some looked much weirder, with elaborate horns and …

Sponges, the members of the phylum Porifera (/ p ə ˈ r ɪ f ər ə /; meaning 'pore bearer'), are a basal animal clade as a sister of the diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells.. Sponges have unspecialized cells that …

Les cténophores (Ctenophora, du grec ktenos, « peigne » et phorein, « porter », référence à la structure en peigne de leurs rangées de cils) ou cténaires sont des organismes marins carnivores transparents et à symétrie rotationnelle. Ils sont planctoniques et pélagiques (plus rarement benthiques) et représentés par près de 150 espèces, répandues dans tous les océans du monde.

Traditionally, the springtails were divided into the orders Arthropleona, Symphypleona, and occasionally also Neelipleona.The Arthropleona were divided into two superfamilies, the Entomobryoidea and the Poduroidea.However, recent phylogenetic studies show Arthropleona is paraphyletic. Thus, the Arthropleona are abolished in modern classifications, and their …

Reptiles, as most commonly defined are the animals in the class Reptilia (/ r ɛ p ˈ t ɪ l i ə / rep-TIL-ee), a paraphyletic grouping comprising all sauropsids except birds. Living reptiles comprise turtles, crocodilians, squamates (lizards and snakes) and rhynchocephalians ().As of March 2022, the Reptile Database includes about 11,700 species. In the traditional Linnaean classification ...