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Is a horseshoe crab a vertebrate or invertebrate?

A horseshoe crab is an invertebrate. It lacks a backbone or spine, which are characteristic features of vertebrates.


What kind of seed pod is black rectangular with four hooks found on beach in NJ?

The seed pod you are describing sounds like that of a horseshoe crab. Horseshoe crab egg pods are rectangular in shape, black, and can often be found washed up on beaches in New Jersey. Each pod contains multiple eggs and has four pointed projections that help it anchor in the sand.


What is an example of a bacterial endotoxin test?

The Limulus amebocyte lysate (LAL) test is a test used to determine if a bacterial cell produces an endotoxin. ILimulus amebocyte lysate is an aqueous extract of blood cells (amoebocytes) from the horseshoe crab, Limulus polyphemus. LAL reacts with bacterial endotoxin or lipopolysaccharide (LPS), which is a membrane component of Gram negative bacteria.


What organism has fossils that show it has changed little over time?

One example of an organism that has fossils showing little change over time is the horseshoe crab. Fossils of horseshoe crabs from millions of years ago closely resemble the horseshoe crabs we see today, indicating that their body plan has remained relatively unchanged. This phenomenon is often referred to as "living fossils."


How fast can a crab move mph?

Crabs can move at varying speeds depending on the species, but they generally range from 1 to 3 miles per hour. Some crabs, like the ghost crab, can run much faster, reaching speeds of up to 10 miles per hour.