are jellyfish dioecious or monoecious?
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Jellyfish of the class Scyphozoa are dioecious. A generalized life cycle of a cnidarian that alternates between polyp and medusa forms is outlined in Figure below. A generalized life cycle of a cnidarian. Medusae primarily reproduce by sexual reproduction with the formation of a larval stage called the planula.
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Predation. Other species of jellyfish are among the most common and important jellyfish predators. Sea anemones may eat jellyfish that drift into their range. Other predators include tunas, sharks, swordfish, sea turtles and penguins.
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Molluscs are either dioecious, with separate sexes, or hermaphroditic, one individual bearing both male and female sex organs. The eggs of aquatic species of bivalves and some species of gastropods develop into trochophores, which in turn usually develop into veliger larvae.
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But despite their name, jellyfish aren't actually fish—they're invertebrates, or animals with no backbones. Jellyfish have tiny stinging cells in their tentacles to stun or paralyze their prey before they eat them. Inside their bell-shaped body is an opening that is its mouth.
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Obelia and jellyfish are two classes of the phylum Cnidaria. Their life cycle alters between polyp and medusa stages. Here, their medusa phase is free-swimming while the polyp phase is sessile. Furthermore, the medusa phase is the sexual phase while the polyp phase is the asexual phase.
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There are two types of jellyfish in Jellyfish Lake, Golden jellyfish and Moon jellyfish — both of which cannot sting you.
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Although the word is mentioned in their name, jellyfish are not fish. A group of jellyfish is called a 'bloom', 'swarm' or 'smack'. ... Jellyfish use their tentacles to sting. Most are harmless to humans but stings from some species, such as the box jellyfish, can be very painful and sometimes kill.
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['Common or Moon jellyfish (aurelia aurita) ... ', 'Compass jellyfish (chrysaora hysoscella) ... ', 'Blue jellyfish (cyanea lamarckii) ... ', "Lion's mane jellyfish (cyanea capillata) ... ", 'Barrel jellyfish (rhizostoma octopus) ... ', 'Mauve stinger (pelagia noctiluca) ... ', "Portuguese man o' war (physalia physalis) ... ", 'By-the-wind-sailor (velella velella)']
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Monoecious and dioecious plants Chara “monoecious ” : Chara is a monoecious organism as both male and female reproductive structures are in the same organisms.
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Despite being referred to as a jellyfish, the Portuguese man-o'-war is in fact a different species, as a true jellyfish is a single organism, and the Portuguese man-o'-war is actually a colony of separate polyps (organisms) that live together in the form of this species.
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Most land snails, or pulmonates, are hermaphrodites, meaning they possess both male and female sexual organs. However, land-oriented prosobranch snails, as well as many water snails, are dioecious, meaning they can be either male or female. The apple snail and the tiny New Zealand mud snail, for example, are dioecious.
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- Sponges and coelenterates are bisexual animals- that possess both male and female reproductive organs, are hermaphrodites. So, the incorrect statement is 'Option D- Sponges and coelenterates are unisexual animals'.
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Despite the “immortal” tag, these jellyfish can and do die. ... The main diet for these jellyfish usually consists of fish eggs, plankton and tiny mollusks. • These jellyfish are quite small and while they do sting, they are not poisonous like the box jellyfish which is also tiny at just 2.5cm long.
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However, most plants are monoecious, meaning that individuals have both female and male structures. In flowering plants, these structures can be borne together in a single bisexual flower, or the flowers can be only male (staminate) or only female (pistillate).
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About half of figs are "monoecious", meaning each tree produces both male and female flowers. The others are "dioecious" and have two kinds of figs on separate plants: "gall figs" with male and female flowers, and "seed figs" with female flowers only.
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Sexes of bivalves can be separate (dioecious) or hermaphroditic (monoecious). The gonad may be a conspicuous, well defined organ as in scallops or occupy a major portion of the visceral mass as in clams.
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When male and female reproductive organs occur on two different plants then the term Dioecious is used e.g. papaya. There is a term bisexual flower instead of bisexual plant. ... Monoecious plants have male flowers and female flowers in separate structures on the same plant.