BIO 202 - Animal Diversity - Lecture 9 Flashcards

Flashcards covering key concepts about Hexapoda and Echinodermata.

Phylum Arthropoda

Insects belong to this phylum, characterized by an exoskeleton, metamerism, and jointed appendages.

What are the three tagmata of insects?

Head, thorax, and abdomen.

How many pairs of walking appendages do insects have?

Six.

What structures do hexapods use for respiration?

Tracheids and spiracles.

What structures do hexapods use for excretion?

Malpighian tubules.

Name four insect orders that undergo holometabolous metamorphosis.

Beetles, butterflies, flies, ants, bees, and fleas.

Name three insect vectors for disease.

Mosquitoes, Tse-Tse flies, and biting bugs.

What type of reproduction is common in arthropods?

Sexual.

List distinguishing characteristics of Phylum Arthropoda

Exoskeleton, metamerism and tagmatization, jointed appendages

Name three distinguishing traits of Phylum Echinodermata.

Pentaradial symmetry as adults, water vascular system, mutable collagenous body wall with endoskeleton.

List the five classes of echinoderms and their feeding strategies.

Crinoidea (filter feeders), Asteroidea (seastars - predators), Ophiuroidea (filter feeders), Echinoidea (sea urchins - grazers), Holothuroidea (sea cucumbers – deposit feeders)

What structures do echinoderms use for locomotion?

Tube feet.

What type of reproduction is common in echinoderms?

Sexual, mostly; fission in some.

List distinguishing characteristics of Phylum Echinodermata

Pentaradial, water vascular system, endoskeleton, dramatic metamorphosis

What type of symmetry do arthropods possess?

Bilateral symmetry.

What is the exoskeleton of arthropods made of?

Chitin.

What is metamerism?

The repetition of similar body segments.

What is tagmatization?

The specialization of body regions in arthropods.

What is the function of Malpighian tubules in insects?

Excretion of nitrogenous waste.

What is the function of