Chapter 21 part 3

The most successful group of animals, the ______, have jointed appendages and an exoskeleton

arthropods

What group of animals is the most successful, in terms of numbers of species and diversity of forms

arthropods

Select all of the following organs or organ systems that are present in arthropods

brain respiratory system eyes and other sensory structures open circulatory system stomach

In arthropods, a tubelike heart propels circulating fluids through an open circulatory system, meaning that

circulating fluids are not confined to vessels

Select all of the characteristics of Phylum Echinodermata

closest animal relatives to chordates bilateral symmetry in larvae deuterostome development radial symmetry in adults

Select all of the following that are crustaceans

crab shrimp barnacle lobster water flea

Select all the examples of mandibulates.

crabs insects lobsters centipedes millipedes

Select all of the following that are insects

crickets aphids lice flies ants beetles

Chewing, jawlike mouthparts found in some arthropods are called

mandibles

Select all the characteristics of myriapods

mandibles one pair of antennae centipedes have one pair of appendages per segment head and many repeated segments

Select all of the habitats where insects are found

marsh desert grassland seashore

Select all the examples of arachnids

mites spiders scorpions ticks

Select all of the following that are examples of arthropods

mosquitoes bees shrimp ticks termites

Millipedes and centipedes are arthropods that belong to a group of mandibulates called

myriapods

Select all the characteristics of the arthropod exoskeleton

oints spanned by muscles lightweight and thin composed mostly of chitin

Select all the features present in arthropods

segmentation exoskeleton that must be shed jointed appendages

Bristles and antennae in arthropods play a role in

sensing the environment

The spiny skin of echinoderms is fused to

skeletal plates

Select all the chelicerate arthropods. Multiple select question.

spiders horseshoe crabs scorpions ticks

Select all the respiratory organs that are present in different types of arthropods

spiracles and tracheae gills book lungs

What group contains 60,000 species, most of which are vertebrates

Chordates

Select all the examples of echinoderms

sea star sea cucumber sand dollar sea urchin

While some insects are less than 1 mm long, others can be as long as

12 inches

What insect has been used as a model organism for over a century

Drosophila melanogaster

Sand dollars, sea lilies, brittle stars, sea stars, and sea cucumbers are members of the phylum

Echinodermata

About 40% of insect species are

beetles

Grasping, clawlike mouthparts of spiders and scorpions are called Multiple choice question.

chelicerae.

What group of arthropods includes members that have clawlike mouthparts, two major body regions, the abdomen and a fused head and thorax, and four or more pairs of walking legs

chelicerates

Mandibulates that have two pairs of antennae and that are mostly aquatic organisms are called

crustaceans

Extinct forms of what type of insect had wingspans as long as a human arm

dragonfly

Select all the characteristics of insects that may have contributed to their success and diversification

evolution of wings reduced competition for food between larvae and adults homeotic genes that modify segments high reproductive rate

Sea stars digest food using a(n)

extendable stomach and series of digestive glands

Select all the characteristics that arachnids and horseshoe crabs have in common

four or more pairs of walking legs chelicerae fused head and thorax

Spiders, scorpions, and horseshoe crabs are arthropods called chelicerates, meaning they have

grasping, clawlike mouthparts

Select all the characteristics that can be found in parasitic nematodes

hooks or suckers thick cuticle produce chemicals to suppress host's immune system production of huge numbers of eggs

Primitive-looking chelicerates with a wide, round exoskeleton, long tailpiece, and blood that contains a unique immune system compound are called

horseshoe crabs

Select all of the research areas that have used the fruit fly as a model organism

human disease, including cancer heredity circadian rhythms animal development

Most insect life cycles involve

indirect development and metamorphosis

The first animals to develop flight were the

insects

Wasps, cicadas, roaches, and fleas are

insects

Terrestrial arthropods reproduce using

internal fertilization

What describes the skeleton of echinoderms

internal plates

Select the adaptations in arthropods that allow precise, forceful, and varied types of locomotion

jointed appendages internal muscles that span joints exoskeleton

Select all the ways that arthropods protect themselves

jump, run, fly away emit foul odors camouflage dig into the soil bite, pinch, and sting

Select all the defenses echinoderms use

pigments for camouflage or warning toxins small pincers on skin spines

The only terrestrial member of a group of arthropods called crustaceans are

pill bugs

What describes sexual reproduction in echinoderms

production of bilaterally symmetrical larvae

Arthropods are characterized by

protostome development and jointed appendages

Select all the ways that echinoderms can survive attacks by predators

regenerate lost arms stiffen collagen-rich tissue

Select all of the following that correctly describe reproduction in arthropods

terrestrial males often produce a waterproof packet of sperm aquatic arthropods can use external fertilization courtship rituals can involve cannibalism

Select the three body regions present in many arthropods, such as insects

thorax head abdomen

The five subphyla of arthropods include three subphyla of mandibulates, one subphylum of chelicerates, and one subphylum containing the 17,000 species of extinct

trilobites

Select the main groups of arthropods

trilobites chelicerates mandibulates

Using muscles and pumping of water, echinoderms extend and retract ______ to move across or firmly grip a substrate

tube feet

Crustaceans have variable body forms, but all have

two pairs of antennae

Select all the characteristics of insects

usually two pairs of wings six legs mandibles three body sections