Which of the following statements about deuterostomes is false?
answer
All deuterostomes exhibit radial symmetry in their bodies.
question
Which structure is not an innovation that occurred during vertebrate diversification?
answer
Exoskeleton
question
True or false? An organism that is radially symmetric has many well-developed head regions.
answer
False
question
Which characteristic distinguishes echinoderms from the other two deuterostome lineages?
answer
Their body plan
question
Which of the following statements about vertebrates is true?
answer
The development of an amniotic egg and internal fertilization allowed vertebrates to reproduce away from water.
question
Which characteristics define a chordate?
answer
The presence of four specific morphological traits
question
Which structure can be used for feeding and gas exchange?
answer
Pharyngeal gill slit
question
Which statement about deuterostomes is correct?
answer
Deuterostomes share key features of embryonic development.
question
Which characteristic is common to all animals in the deuterostome lineage?
answer
All deuterostomes have a mesoderm-lined coelom.
question
Which trait is a diagnostic feature of echinoderms?
answer
Water vascular system
question
What defines a chordate?
answer
Presence of a notochord
question
Which of the following statements about bone found in early vertebrates is correct?
answer
The bone in early vertebrates formed a protective exoskeleton.
question
Which structure represents a key innovation that arose during vertebrate diversification?
answer
Amniotic egg
question
Which of the following statements best represents evidence supporting the leading hypothesis regarding the evolution of jaws in vertebrates?
answer
Both jaws and gill supports are derived from the same type of specialized embryonic cells.
question
Which of the following statements about tetrapod limbs is true?
answer
The expression patterns of regulatory developmental proteins have given information about the evolution of the tetrapod limb.
question
Amniotic eggs have four membranes. Which membrane is correctly matched with its function?
answer
The allantois contains nitrogenous waste.
question
How do viviparity and the placenta affect mammalian reproduction?
answer
Placental mammals produce small numbers of large offspring.
question
What organism would possess these structures: a ring of nerve cells around the mouth, a series of fluid-filled canals, and tube feet?
answer
Adult echinoderm
question
Which two features are possessed by all vertebrates at some point in their life?
answer
Tail and cranium
question
Which vertebrates lack jaws?
answer
Lampreys
question
What is a unique feature of marsupial reproduction?
answer
Marsupial young spend more time developing outside the mother's body than inside.
question
Which of the following statements about reptiles is true?
answer
Reptile skin is made watertight by a layer of scales made of keratin.
question
What is the name given to the group of species on the branch leading to contemporary humans?
answer
Hominins
question
Which of the following statements is a component of the out-of-Africa hypothesis?
answer
The first Homo sapiens fossils appear in East African rocks from 195,000 years ago. Homo sapiens fossils are found throughout Europe, Asia, Africa, and Australia in rocks dated between 60,000 and 30,000 years ago.
question
Which of the following deuterostomes is most likely to be found in nature?
answer
An ectotherm that has a swim bladder and protrusible jaws and carries out external fertilization
question
An owner of a small zoo houses a lemur, some gibbons, and two chimpanzees. What behavior or trait would zoo visitors likely see exhibited by all of these animals as well as by the zookeeper?
answer
Socializing with peers
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