HOMEWORKS Flashcards
ALL animals are multicellular, eukaryotic, aerobic, and heterotrophic
true
Animals which demonstrate ________________________ symmetry only have one plane of symmetry (do not hyphenate this word)
bilateral
Cnidarians are the most ancient group of animals on the planet
false
In the evolutionary trend of _____________________________, sensory organs become increasingly found near the anterior end and central nervous system of the animal
cephalization
In the embryological development of an animal, the hollow space within the bastula is called the blastocoel
true
In a ____________________________ animal, only two embryological germ layers form during development
diploblastic
In Protostome animals, the blastopore eventually develops into the anus of the animal
false
Which embryological germ layer eventually develops into the skeletal and muscular systems in animals that possess them? ___________________________
mesoderm
Arthropods are the most diverse animal phylum on the planet
true
In ____________________________ animals, the blastopore eventually develops into the anus of the animal
deuterostomes
In Pseudocoelomate animals, the coelom is derived from both the ectoderm and the mesoderm
false
The ______________________ of an animal is a fluid or air filled space between the digestive tract and the outer body wall
coelom
Chordates and Echinoderms are both Deuterostome animal phyla
true
The scientific clade (taxonomic group) known as ________________________ includes ALL animals with true tissues (ONLY sponges are eliminated from this group)
eumetazoa
The nervous system of animals (who possess them) is derived from the ectoderm
true
Most sponges demonstrate radial symmetry
false
The inner body of a sponge is lined with specialized cells known as ____________________________ that create water currents through the sponge (use plural version of the term)
choanocytes
Sponges lack biological tissues, and excretion and respiration are accomplished by simple diffusion
true
Sponges have sharp structures incorporated into their body wall known as __________________________ which provide the sponge with protection against predators (use plural version of the word)
spicules
Cnidarians lack a central nervous system
true
Many Cnidarians have specialized stinging cells along their tentacles known as _________________________ (use plural version of the word)
nematocysts
Sea fans are in the Cnidarian class: Hydrozoa
false
Hydras have two major body forms during their life cycle, the mobile medusae phase, and the sessile ___________________ phase (using singular term)
polyp
Animals within the Phylum: Platyhelminthes are acoelomate
true
Flatworms accomplish excretion utilizing protonephridia that are comprised of individual units called ______________________ cells
flame
The pharynx of a flatworm plays an important role in gas exchange in these animals
false
The digestive organ in the Earthworm known as the ___________________, helps mash and grind up material as it moves through the digestive tract
gizzard
Some animals in the Class: Oligochaeta have the ability to live among hydrothermal vents on the ocean floor
false
Animals in the Class: Polychaeta have muscled, bristled appendages known as ________________________ which allow these animals to efficiently move in an aquatic environment
parapodia
Earthworms have a closed circulatory system with five anterior aortic arches that pump oxygen to the rest of the body
true
