SFSU Bio 240 Exam 3 Questions And Answers Verified 100% Correct

SFSU Bio 240 Exam 3 Questions And Answers Verified 100% Correct kin selection - ANSWER -natural selection in favor of behavior by individuals that may decrease their chance of survival but increases that of their kin (who share a proportion of their genes). Lepidosaur - ANSWER -The Lepidosauria are reptiles with overlapping scales. This subclass includes Squamata and Rhynchocephalia. It is a monophyletic group and therefore contains all descendents of a common ancestor. Lophotrochozoa - ANSWER -Lophotrochozoa is a clade of protostome animals within the Spiralia. The taxon was established as a monophyletic group based on molecular evidence. worms Lobe-fin fishes - ANSWER -The Sarcopterygii or lobe-finned fish - sometimes considered synonymous with Crossopterygii - constitute a clade of the bony fish, though a strict cladistic view includes the terrestrial vertebrates. lungfishes - ANSWER -Lungfish are freshwater rhipidistian fish belonging to the subclass Dipnoi. Lungfish are best known for retaining characteristics primitive within the Osteichthyes, including the ability to breathe air, Mammalia - ANSWER -Mammals are the vertebrates within the class Mammalia, a clade of endothermic amniotes distinguished from reptiles by the possession of a neocortex, hair, three middle ear bones, and mammary glands. mantle - ANSWER -an outer or enclosing layer of tissue, especially (in mollusks, cirripedes, and brachiopods) a fold of skin enclosing the viscera and secreting the substance that produces the shell. marsupial - ANSWER -a mammal of an order whose members are born incompletely developed and are typically carried and suckled in a pouch on the mother's belly. Marsupials are found mainly in Australia and New Guinea, although three families, including the opossums, live in America. mesoderm - ANSWER -middle skin Metazoa - ANSWER -animal Mollusk - ANSWER -an invertebrate of a large phylum that includes snails, slugs, mussels, and octopuses. They have a soft, unsegmented body and live in aquatic or damp habitats, and most kinds have an external calcareous shell. Monotremata - ANSWER -Monotremes are one of the three main groups of living mammals, along with placentals and marsupials. morphological - ANSWER -relating to the branch of biology that deals with the form of living organisms, and with relationships between their structures. Nematoda - ANSWER -The nematodes or roundworms constitute the phylum Nematoda. They are a diverse animal phylum inhabiting a broad range of environments. notochord - ANSWER -a cartilaginous skeletal rod supporting the body in all embryonic and some adult chordate animals. Osteichthyans - ANSWER -Osteichthyes, popularly referred to as the bony fish, is a diverse taxonomic group of fish that have skeletons primarily composed of bone tissue, as opposed to cartilage pesticides - ANSWER -a substance used for destroying insects or other organisms harmful to cultivated plants or to animals. Platyhelminthes - ANSWER -The flatworms, flat worms, Platyhelminthes, Plathelminthes, or platyhelminths are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates. Porifera - ANSWER -sponge pneumatic - ANSWER -(chiefly of cavities in the bones of birds) containing air. primate - ANSWER -A primate is a mammal of the order Primates. In taxonomy, primates include two distinct lineages, strepsirrhines and haplorhines protostome - ANSWER -a multicellular organism whose mouth develops from a primary embryonic opening, such as an annelid, mollusk, or arthropod. pseudocoelom - ANSWER -The pseudocoelom is a fluid-filled body cavity lying inside the external body wall of the nematode that bathes the internal organs, including the alimentary system and the reproductive system radula - ANSWER -(in a mollusk) a rasplike structure of tiny teeth used for scraping food particles off a surface and drawing them into the mouth. Radiata - ANSWER -Radiata or Radiates is a historical taxonomic rank that was used to classify animals with radially symmetric body plans, and is no longer accepted sea urchins ray-finned fishes - ANSWER -Actinopterygii, or the ray-finned fishes, constitute a class or subclass of the bony fishes. The ray-finned fishes are so called because their fins are webs of skin supported by bony or horny spines Reptilia - ANSWER -Reptiles are tetrapod animals in the class Reptilia, comprising today's turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct relatives. symbiosis - ANSWER -interaction between two different organisms living in close physical association, typically to the advantage of both. synapomorphy - ANSWER -a characteristic present in an ancestral species and shared exclusively (in more or less modified form) by its evolutionary descendants. Tardigrada - ANSWER -Tardigrades are water-dwelling, eight-legged, segmented micro-animals. They were first discovered by the German zoologist Johann August Ephraim Goeze in 1773. Tetrapods - ANSWER -a four-footed animal, especially a member of a group that includes all vertebrates higher than fishes. Tiktaalik - ANSWER -Tiktaalik is a monospecific genus of extinct sarcopterygian from the late Devonian period, about 375 MYA, having many features akin to those of tetrapods. torsion - ANSWER -(in a gastropod mollusk) the spontaneous twisting of the visceral hump through 180° during larval development.