Invertebrate Study Guide

<p>Flight facilitates the escape from predators. (C)</p> Signup and view all the answers

<p>Incomplete metamorphosis involves gradual changes while complete involves abrupt changes. (A)</p> Signup and view all the answers

<p>Myriapoda (D)</p> Signup and view all the answers

<p>Open circulatory system (C)</p> Signup and view all the answers

<p>Locomotion and feeding (C)</p> Signup and view all the answers

<p>Sea cucumbers and sea urchins (C)</p> Signup and view all the answers

<p>Locomotion (A), Food processing (B), Defense (C), Sensory perception (D)</p> Signup and view all the answers

<p>It aids in locomotion and feeding through tube feet. (B)</p> Signup and view all the answers

<p>Number of legs, with millipedes having more. (B)</p> Signup and view all the answers

<p>Head, thorax, and abdomen (A)</p> Signup and view all the answers

<p>Nutrients and gases are exchanged directly with tissues. (C)</p> Signup and view all the answers

<p>Butterflies, which undergo stages from egg to larva to pupa to adult (C)</p> Signup and view all the answers

<p>Arthropoda (B)</p> Signup and view all the answers

<p>They transition directly from larva to adult without a pupa stage. (D)</p> Signup and view all the answers

<p>They undergo ecdysis, or molting of a cuticle. (C)</p> Signup and view all the answers

A major clade of animals that includes animals with a cuticle that needs to be shed for growth. This shedding process is called ecdysis.

Two phyla within Ecdysozoa. Nematoda includes roundworms, and Arthropoda includes insects, spiders, and crustaceans.

Nematodes are roundworms with unsegmented bodies and a pseudocoelom, while Annelids are segmented worms with a true coelom.

An arthropod body is segmented, with a hard exoskeleton made of chitin. It consists of a head, thorax, and abdomen segments.

Arthropod appendages can be modified for functions like walking, swimming, feeding, sensing, and defense.

An open circulatory system has hemolymph that circulates freely within the body cavity, whereas a closed circulatory system has blood confined to vessels.

Both belong to Phylum Arthropoda. Millipedes are slow, have two pairs of legs per segment, and are herbivores. Centipedes are fast, have one pair of legs per segment, and are carnivores.

Flight in insects contributed significantly to their success due to increased mobility, efficient dispersal, access to food sources, and escape from predators.

Incomplete metamorphosis involves three stages: egg, nymph, and adult. Nymphs resemble smaller versions of adults and undergo molting to grow.

The process of shedding an outer cuticle, allowing growth. Common in animals within the 'Ecdysozoa' clade.

Roundworms belonging to the phylum Nematoda. They have unsegmented bodies, a pseudocoelom, and a tough cuticle.

Segmented worms belonging to the phylum Annelida, they have a true coelom, and often have bristles called setae.

Open circulatory system: hemolymph circulates freely in the body cavity. Closed: blood is confined to vessels.

Arthropods possess an open circulatory system, where hemolymph, not blood, circulates freely.

Both belong to Phylum Arthropoda. Millipedes are slow, have two pairs of legs per segment, and are herbivores. Centipedes are fast, have one pair of legs per segment, and are carnivores.

Complete metamorphosis involves four distinct stages: egg, larva, pupa, and adult (e.g., butterfly). Incomplete involves three: egg, nymph, and adult (e.g., grasshopper).