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Free-living flatworms are mostly predators, and live in water or in shaded, humid terrestrial environments, such as leaf litter. Cestodes (tapeworms) and trematodes (flukes) have complex life-cycles, with mature stages that live as parasites in the digestive systems of fish or land vertebrates , and intermediate stages that infest secondary hosts.
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Like other members of the genus Pseudobiceros, P. hancockanus is hermaphroditic with each individual able to function as either a male or female. Mating between two such worms involves penis fencing, as each worm tries to inject sperm into the other with one of its two stubby penises, while trying to avoid being inseminated itself.
Penis fencing is a mating behavior engaged in by many species of flatworm, such as Pseudobiceros hancockanus. Species which engage in the practice are hermaphroditic; each individual has both egg-producing ovaries and sperm-producing testes. [1] The flatworms "fence" using extendable two-headed dagger-like stylets.
Pacific sea nettles, Chrysaora fuscescens. Cnidaria (/ n ɪ ˈ d ɛər i ə, n aɪ-/ nih-DAIR-ee-ə, NY-) [4] is a phylum under kingdom Animalia containing over 11,000 species [5] of aquatic invertebrates found both in fresh water and marine environments (predominantly the latter), including jellyfish, hydroids, sea anemones, corals and some of the smallest marine parasites.
General Non-human Great Ape Susceptibility to COVID-19 Although the susceptibility of SARS-CoV-2 infection among many non-human primates is unknown, all catarrhines , monkeys and apes from Africa and Eurasia, have the same set of 12 amino acid residues as human ACE2 where SARS-CoV-2 enters the host cell leading to infection.
Pandemic: How to Prevent an Outbreak is a 2020 American documentary series about pandemics. It was released on Netflix on January 22, 2020. [ 1 ] The series covers a range of issues such as the possibility of an influenza pandemic, research into achieving a universal vaccine , emerging viruses, anti-vaxxers , and the Ebola outbreak in Africa .
Platydemus manokwari, also known as the New Guinea flatworm, is a species of large predatory land flatworm. Native to New Guinea , it has been accidentally introduced to the soil of many countries, including the United States. [ 3 ]
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