WebRespiration is facilitated by ctenidia (gills) that are present ventrally. These animals possess a radula that is modified for scraping. ... Class Bivalvia (“two shells”) includes clams, oysters, mussels, scallops, and geoducks. … Webclams. The ctenidia (gills) of giant clams are known to take part in the uptake and assimilation of ammonia from the external medium (Rees et al. 1994; Shepherd et al. 1999). They display high activity of glutamine synthetase (GS), which participates in ammonia assimilation by catalyzing the ligation of NH 4 +
Ctenidia of a Clam - YouTube
WebSep 7, 2016 · Giant clams harbor symbiotic zooxanthellae and manifest light-enhanced calcification. In light, they also increase the absorption and assimilation of exogenous ammonia, but the roles of the host and symbionts are unclear and the reason for light dependency remains enigmatic. Here, we report the complete coding cDNA sequence of … WebFeb 2, 2010 · The mollusks are among the most diverse, and well-known of the invertebrate groups and include the clams, snails, tusk shells, chitons, and squids (Figures A-G). Nielsen (2001) ... They do not have ctenidia, but sometimes do have secondary gills. There are no specialized excretory organs. Some of the aplacophorans do not have a radula. can you use goodrx while on medicare
The Zooxanthellal Tubular System in the Giant Clam - JSTOR
WebApr 10, 2024 · Tridacnid clams belong to the order Bivalvia which includes the various families we commonly refer to as clams. The family Tridacnidae currently contains eight species* in two genera, Hippopus and Tridacna: Hippopus hippopus, H. porcellanus, Tridacna crocea, T. derasa, T. gigas, T. maxima, T. squamosa and T, tevoroa**. WebIncludes chitons, tusk shells, snails, slugs, nudibranchs, sea butterflies, clams, mussels, oysters, squid, octopuses, and nautiluses. Briefly describe mollusc feeding patterns: Herbivorous grazers, predaceous carnivores, filter feeders, and parasites. Briefly describe the habitat range for molluscs: WebSep 20, 2024 · Clams, too, will form these shimmering clumps to trap irritants that enter their shells. In fact, a fisherman once found a 34-kilogram pearl inside a giant clam. So, … can you use goodrx on medicare