Week 9 - Quiz 7

Which of the following statements about arthropods is FALSE? Arthropods have an incomplete digestive tract. Arthropods display segmentation. Arthropods have an open circulatory system. Arthropods have a true coelom. Arthropods have an exoskeleton.

Arthropods have an incomplete digestive tract.

What is a disadvantage to having an exoskeleton?

Exoskeletons must be shed when the animal grows, exposing the animal to predators.

True or False: An exoskeleton is a characteristic of an echinoderm.

False

True or False: Echinoderms are characterized by bilateral symmetry in adults, a water vascular system, tube feet, and spiny skin.

False

True or False: Maxillae are used to bite and grind food.

False

Echinoderms' radial symmetry enables which of the following? An unusually rapid nutrient uptake Rapid adaptation to extremes of temperature A greatly reduced metabolism The ability to respond effectively in every direction of their surrounding environment An unusually long lifespan

The ability to respond effectively in every direction of their surrounding environment

True or False: Malpighian tubules are used for excretion.

True

True or False: Members of the Ecdysozoa clade are characterized by having a cuticle.

True

As adults, ____ are the only sessile crustaceans whose external anatomy is completely different than its fellow crustaceans.

barnacles

seastars are primarily

carnivores

An elongate uniramid with many legs as well as poison claws is known as a(n):

centipede

A nauplius larva is characteristic of:

crustaceans

Biramous appendages in arthropods are only present in which organism?

crustaceans

Movable spines are found on ____ of the phylum Echinodermata.

echinoidea

All echinoderms are found:

in marine habitats.

Arthropods with mandibles, a single pair of antennae, and two legs on most body segments are:

millipedes

Most arachnids have ____ pair(s) of jointed appendages.

six

Which arthropod has chelicerae, pedipalps, and silk glands?

spider

Gas exchange in terrestrial insects is accomplished through:

the use of tracheae

Echinoderms are unique because:

their larvae are bilaterally symmetrical while the adult is pentaradially symmetrical.

The most unique feature of the echinoderms is their:

water vascular system

Which is a unique adaptation in insects not found in any other arthropod?

wings