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saya tidak suka di foto
saya tidak suka di foto
最后更新: 2020-07-02
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saya tidak suka
apakah anda suka vidio seks
最后更新: 2023-03-03
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ibu saya tidak memasak di dapur
ibu saya tidak memasak nasi didapur
最后更新: 2023-02-16
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saya tidak pernah
echinoderms usually have separate sexes, with a few exceptions among the asteroids, holothurians and ophuroids. the breeding season is mainly spring and summer and reproduction is generally through release of gametes into the water column and indirect development through a variety of larval stages. in some species of each class the females produce yolky eggs from which non-feeding, lecithotrophic larvae develop. additionally, a few species brood large yolky eggs until they hatch as a small version of the adult. reproductive strategy and subsequent larval development within the echinodermata is very varied, often with a number of species in each class/subclass differing in their strategies from the others. this makes a concise summary of larval development difficult, not helped, as pointed out by mcedward & miner (2001), by the inconsistent terminology used between classes by different authors, especially for the non-feeding larvae with simple morphology. the various types of echinoderm larvae have been given individual names and while some types are particular to one class/subclass (table 1), others are found in more than one group, making even identification to a particular group problematical to the non-specialist. larvae do not resemble the parent and are generally bilaterally symmetrical, even though they metamorphose into radially symmetrical adults. many are planktotrophic, feeding on unicellular algae and particulates, using bands of cilia that run over their bodies. some have spots or bands of pigment, usually only visible in fresh specimens. they spend a few weeks in the plankton and then settle over a short period. for those with indirect development, metamorphosis is typically very radical and may start before or after settlement. many of the larvae are small and delicate so will not survive sampling and preservation well, while some others are brooded or benthic, so the majority of echinoderm larvae found in plankton samples will be of a restricted number of types. because some larval types are found in more than one group, larval types are sequentially described, rather than giving developmental information individually for each class/subclass. echinoderm larval types
最后更新: 2015-05-17
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maaf saya tidak mengerti
最后更新: 2024-05-11
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saya tidak ada paket data
malas
最后更新: 2021-04-11
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saya tidak mengerti bahasa anda
最后更新: 2021-06-20
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maaf saya tidak punya whatsapp kamu
maaf saya tidak punya whatsapp kamu
最后更新: 2021-07-01
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maaf, saya tidak bisa menerima panggilan
maaf, saya tidak bisa menerima panggilan
最后更新: 2023-09-08
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maaf saya tidak pandai berbahasa inggris
最后更新: 2021-01-28
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saya tidak pergi ke bandung setiap hari
最后更新: 2020-08-28
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terserah kamu bilang apa,saya tidak peduli
apalagi kamu bilang apa,saya tidak peduli
最后更新: 2020-11-30
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maaf saya tidak punya sejumlah uang sebanyak itu
aku tunggu kamu di indonesia
最后更新: 2023-03-04
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saya dan kakak saya tidak sedang belajar matematika
ayah saya sedang memperbaiki motor
最后更新: 2021-09-24
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jika saya tidak bangun kesiangan saya tidak akan terlambat
最后更新: 2024-02-05
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saya tidak punya waktu untuk berfoto seluruh tubuh
最后更新: 2021-04-05
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