Ctenophores Quiz

Study Notes

Ctenophores

The word "ctenophores" comes from the Greek words "ktenos" meaning "comb" and "phoros" meaning "bearer", referring to the row of comb-like plates called ctenes or comb plates that they use for swimming and capturing prey.

Defense Mechanisms and Feeding

Ctenophores defend themselves by bioluminescing, releasing a cloud of light to distract or confuse predators, and by using their sticky tentacles to capture prey.
They capture food using their sticky tentacles, which are covered with adhesive cells called colloblasts that help to immobilize the prey.

Reproductive System

Ctenophores have a simple, hermaphroditic reproductive system, meaning they produce both sperm and eggs.
They reproduce by releasing gametes into the water column, where fertilization occurs.

Comparison to Jellyfish

Unlike jellyfish, ctenophores do not have a gastrovascular cavity, which is a digestive system with a single opening that serves as both mouth and anus.
Instead, ctenophores have a unique, two-layered digestive system with a mouth and separate anus.

Nervous System

Ctenophores possess a decentralized, network-like nervous system called a "nerve net", which is spread throughout their bodies.
This nerve net allows ctenophores to respond to stimuli and coordinate basic movements.

Description

Test your knowledge about ctenophores, the earliest animals resembling jellyfish. Learn about their unique features, such as the coordinated beating of cilia for propulsion and their distinct comb-like appearance. This quiz will challenge your understanding of these marine creatures and their characteristics.