”和最后一段的“In addition to their value in medical research, horseshoe crabs fill important ecological roles.(除了在医学研究上的价值外,鲎还扮演着重要的生态角色。)”可知,本文主要介绍的是鲎这种生物的医学价值和生态角色,属于科普知识。由此推知,本文很有可能在“科学”网站读到。故选A。 反馈 收藏 ...
lies in its retina. For the most part, horseshoe crabs (Limulus polyphemus) take little notice of their surroundings. But behavioural tests have shown that males can see females in almost any situation, even in the dark or when the female’s hard outer shell, or carapace,...
THE ROACHES OF THE OCEAN. HORSESHOE CRABS HAVE SURVIVED SINCE PREHISTORIC TIME, BUT MAN IS JUST BEGINNING TO UNDERSTAND THEM.(DAILY BREAK)Checca, Carey
Horseshoe crabs have copper-rich blood that appears to be striking blue in color. Proteins in the horseshoe crab’s blood cells are released in response to even the smallest amount of bacterial endotoxin (内毒素), such as E. coli. The presence of bacteria causes horseshoe crab blood to clot...
In order to withstand tidal currents, juvenile horseshoe crabs frequently burrow in the sand. Such burrowing discourages barnacles from clinging to their shells. When fully grown, however, the crabs can readily withstand tidal currents without burrowing, and thus they acquire substantial populations of...
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Researchers have for the first time traced the roots of crabs, lobsters and shrimp to create the family tree of crustaceans people love to eat.
Horseshoe crabs use hemocyanin to carry oxygen through their blood.Because of the copper present in hemocyanin, their blood is blue. Their blood contains amebocytes, which play a similar role to the white blood cells of vertebrates in defending the organism against pathogens. ...
Arthropod passions will soar along Florida's coastal waters in March and April as we reach peak mating season for horseshoe crabs.