Homo floresiensis was different from our own species (Homo sapiens) in that it ____________________.
Lived millions of years ago.
Lived in a place that is inhospitable to modern humans.
Was only two feet tall.
Had a smaller brain.
An organism is multicellular, ingests food, and undergoes a metamorphosis stage during its lifetime. What type of organism is it?
The phrase "Cambrian explosion" refers to _______________________________________.
The evolutionarily sudden proliferation of mammal species.
The rapid adaptive radiation that gave rise to most extant animal phyla.
The evolutionary transition from aquatic to terrestrial vertebrates.
The asteroid impact that caused the mass extinction at the cretaceous-tertiary boundary.
The evolutionarily sudden proliferation of dinosaur species.
Animals probably evolved from colonial protists. how do animals differ from these protist ancestors?
The protists were autotrophic.
Animals have cells that are more specialized.
The protists were heterotrophic.
Animals are able to reproduce.
The protists were prokaryotic.
Which of the following is associated with bilateral symmetry?
A lack of true tissues
No true body tissue.
A stationary lifestyle.
A definite "head end".
A lack of body tissues.
Which of the following is radially symmetrical?
A submarine sandwich.
Which animal phylum is most closely related to the phylum Chordata?
Which of the following statements is true?
The majority of the world's animals are autotrophic.
The majority of the world's animals are radially symmetrical.
The majority of the world's animals are chordates.
The majority of the world's animals are invertebrates.
The majority of the world's animals are unicellular.
Unlike other animals, sponges __________.
Lack true tissues.
Exhibit bilateral symmetry.
Possess cell walls.
Sponges feed by ____________________.
Paralyzing small crustaceans with stringing cells.
Scraping bacteria and algae from hard substrates.
Filtering small particles from water.
Absorbing nutrients from the guts of their hosts.
The animal phylum most like the protists that gave rise to the animals is __________.
Which of the following are found in members of the phylum Cnidaria?
Exoskeleton, radial symmetry.
Internal skeleton, bilateral symmetry.
Stinging cells, bilateral symmetry.
Stinging cells, radial symmetry.
A mantle for respiration, radial symmetry.
Consider the following list of animals: giant squid, earthworm, largemouth bass, snail, tapeworm, coral, and sea star. The two that belong to the sam phylum are the _______________, and their phylum is __________.
Bass and giant squid; Chordata.
Earthworm and tapeworm; Annelida.
Snail and coral; Annelida.
Giant squid and snail; Mollusca.
Coral and sea star; Echinodermata.
Flatworms are the simplest animals with _______________.
A body cavity.
A complete digestive tract.
Earthworms are most closely related to __________.
Are named for the stinging cells they use to kill their prey.
Are segmented worms.
Are radially symmetrical.
Include leeches, earthworms, and roundworms.
Biology deals with many kinds of worms. Which choice includes three different phyla of "worms"?
Nematoda, Platyhelminthes, Echinodermata.
Platyhelminthes, Annelida, Nematoda.
Mollusca, Chordata, Echinodermata.
Nematoda, Cnidaria, Porifera.
Cnidaria, Arthropoda, Corals.
Animals such as __________ are the simplest animals to have __________.
Jellies; a complete digestive tract.
Roundworms; a complete digestive tract.
Flatworms; a true body cavity.
Sponges; bilateral symmetry.
Snails; a body cavity.
The __________ include the largest number of species.
In arthropods, molting is necessary because _________________________.
The exoskeleton is progressively resorbed by body tissue.
The chitinous exoskeleton cannot grow.
The environment degrades the exoskeleton, which therefore must be shed and replaced.
This is how arthropods reproduce.
Arthropod appendages generally increase in number as the animal ages.
The majority of animal species are __________.
Lacking a body cavity.
A sea star and a hookworm belong to the phyla __________ and __________, respectively.
The water vascular system of a sea star functions in __________.
Keeping all parts of the body moist at low tide.
Pumping water for swimming movements.
Movement of the tube feet.
Which one of the following is thought to be most closely related to humans?
An animal has segments, bilateral symmetry, pharyngeal slits, a post-anal tail, and a notochord. It must be a member of the phylum __________.
A __________ is a chordate but not a vertebrate.
A distinguishing feature of vertebrates is the presence of __________.
A gastrovascular cavity.
A post-anal tail.
Which of the following do a lamprey, a shark, a lizard, and a rabbit all have in common?
They all have jaws.
They all have gill structures in the embryo or adult.
They are all tetrapods.
They are all ectothermic.
They are all amniotes.
How do lampreys differ from other living vertebrates?
Lampreys lack both jaws and paired appendages.
Lampreys have an endoskeleton.
Lampreys are endothermic.
Lampreys have an exoskeleton.
Lampreys are amniotes.
A feature of bony fish not found in sharks is _______________.
Pelvic and pectoral fins with bony supports.
A swim bladder.
A lateral line system.
The gill flap, or operculum, was an important adaptation for fish because it helps with ____________________.
Sensing chemicals in water.
Maintaining a supply of oxygen.
Orientation in currents.
The first vertebrates to colonize land were __________.
The development that freed vertebrates from water for reproduction and allowed them to radiate into diverse terrestrial environments was the __________.
Lateral line system.
Which of the following is shared by living birds and living reptiles?
Having an operculum.
Scales containing keratin.
Which of the following pairs is matched correctly?
Aves; little brown bat.
Osteichthyes; great white shark.
Jawed fish; lamprey.
All mammals ____________________.
Complete their embryonic development in the uterus.
Are nurtured in the mother by the placenta.
Bear live young.
Have mammary glands.
The kangaroo is an example of a(n) __________ mammal.
have young that develop within the female's body.
Have a tendency toward single births.
Have a pouch where the young develop.
Have a tendency toward multiple births.
There are three major groups of mammals, categorized on the basis of their _______________.
Method of Reproduction.
Presence or absence of hair.
Method of locomotion.
There are three major groups of primates. Which of the following includes one representative from each of the three groups?
Lemur, loris, chimpanzee.
Loris, baboon, chimpanzee.
Lemur, tarsier, baboon.
Monkey baboon, human.
Tarsier, monkey, gorilla.
Primates are distinguished by characteristics adapted for what?
Living in the trees.
Humans, apes, and monkeys are classified together as _______________.
New World monkeys.
Primates are distinguished from other mammals by _________________________.
Dexterous hands, nails, and good depth perception.
Fur, claws, and small litters.
Long tails used for balance, good depth perception, and opposable thumbs.
Placental reproduction, opposable thumbs, and good depth perception.
Good depth perception, mammary glands, and single births.
The lineage that led to humans diverged from the one that led to chimpanzees about _____ million years ago.
Humans are most closely related to __________.
Hominids include __________ but not __________.
Humans; great apes.
The evolution of humans included which of the following?
The evolution of dexterous hands.
Development of good depth perception.
Providing parental care.
Having multiple births.
Increased brain size.
Which of the following correctly lists probably ancestors of modern humans fro the oldest to the most recent?
Australopithecus, Homo habilis, Homo erectus
Homo erectus, Homo habilis, Australopithecus
Homo habilis, Homo erectus, Australopithecus
Australopithecus, Homo erectus, Homo habilis
Homo erectus, Australopithecus, Homo habilis
__________ arose very early in hominid evolution; __________ evolved more recently.
Large brains; upright posture.
Culture; forward-looking eyes.
Upright posture; forward-looking eyes.
Large brains; prominent brow ridges.
Upright posture; large brains.
Bipedalism is associated with what hominid?
Neanderthals, although they were stooped in posture.
The first hominid known to make tools is (was)__________.
Neanderthals were similar to modern humans in that some of them _______________.
Had small brow ridges.
Lived 10,000 years ago.
Did not use tools.
Lived in Africa.
Had red hair and fair skin.