WebStudy with Quizlet and memorize flashcards containing terms like In the past, species of sponges, cnidarians, and ctenophores were referred to as "lower" or "primitive" animals because of their relatively simple body plans and lack of any sophisticated organ differentiation. ... Ediacaran fossils are generally interpreted as animals, but most ... WebJan 17, 2024 · In modern oceans, sponges are often the most abundant organisms in rocky reef environments. They fulfil important ecological functions as part of bottom-dwelling …
Sponge - Reproduction Britannica
WebTerms in this set (55) Phyla Porifera and Cnidaria. sponges and cnidarians are eukaryotic, multicellular, and ingestive feeding heterotrophs. Phylum Porifera (2) sessile filter feeding heterotrophs, asymmetrical bodies without distinct tissues or organs (sponges) -choanocytes/collar cells. -amoebocytes. Phylum Cnidaria (Coelenterata, 3) WebMost sponges are hermaphrodites (function as both sexes simultaneously), although sponges have no gonads (reproductive organs). Sperm are produced by choanocytes or … famed studios
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WebMost sponges are carnivores that suck prey in through specialized pores. F Feeding currents in sponges are produced by flagellated cells called choanocytes. T Food is trapped in most sponges by mineralized structures called spicules. F Support material in sponges is always made of calcium carbonate. F WebApr 30, 2024 · Typically, most sponges are viviparous, and after fertilization, the zygote is retained in and derives nourishment from the parent, and a ciliated larvae is later … WebHowever, the body wall is generally thicker and more complex with incurrent canals rather than simple pores. In fact there is quite a variation in complexity in syconoid sponges. In some of these sponges water enters through a canal lined by many cells. Leuconoid sponges are the most complex in design in that not all the chambers are ... convocation gown on rent