In chordates, the long supporting rod that runs through the body is called the. nerve cord. notochord. pharyngeal pouch. tail. Which of these chordate characteristics exists as paired structures?. tail notochord pharyngeal pouch nerve cord.
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Suppose a fish is swimming upstream in total darkness. Which of the following would be most likely to help the fish sense aquatic predators that approach it from behind?
The harder a body part is, the greater the chance that it will be well preserved as a fossil. On that basis, which of the following groups of fishes would leave the best-preserved fossils of their skeletons?
Some species of amphibians have skin color and markings that enable them to blend in with their surroundings. This would be most effective against predators that hunt by sensing the
When a fish that spends most of its life in the ocean enters a river and migrates upstream to breed, its kidneys adjust by producing dilute urine. _________________________
If a fish lacks true teeth, has no vertebrae, and has a skeleton that contains cartilage, it belongs to the group known as cartilaginous fishes. _________________________
A scientist who studies vertebrate fossils would find the earliest amphibian fossils in rocks dating from the late Devonian Period. _________________________
0 of 5 adult, it is aIn fishes and amphibians, gills develop from slits that form in the _________________________.
0 of 5 adult, it is aIndividual segments of the backbone are called ____________________.
0 of 5 adult, it is aUnlike an adult tunicate, an adult lancelet has a head region that contains a(an) ____________________.
0 of 5 adult, it is aOne basic characteristic of fishes is the presence of ____________________, which fishes use to obtain oxygen from water.
0 of 5 adult, it is aThe skeletons of some ancient fishes were made of ____________________, which is softer and more flexible than bone.
0 of 5 adult, it is aThe adaptation that greatly expanded the range of food sources available to early fishes was the evolution of ____________________.
0 of 5 adult, it is aAdult salmon can distinguish their home stream from other streams by using their sense of ____________________.
0 of 5 adult, it is a
The part of a fish’s brain that processes olfactory information is the ____________________, which controls voluntary movements in most other vertebrates.
0 of 5 adult, it is aIf a vertebrate is aquatic as a larva and terrestrial as an adult, it is a(an) ____________________.
0 of 5 adult, it is aThe Carboniferous Period is sometimes referred to as the Age of ____________________.
0 of 5 adult, it is a
One adaptation of amphibians for life on land is the presence of mucus glands in the skin, which can help protect amphibians from _________________________.
Figure 30–2 adult, it is a
0 of 5 adult, it is aIn the frog’s heart shown in Figure 30–2, the structure labeled B is the ____________________.
0 of 5 adult, it is aIn the frog’s heart shown in Figure 30–2, blood from the ____________________ enters the structure labeled A.
0 of 5 adult, it is aAn organ that is part of a frog’s digestive, excretory, and reproductive systems is the ____________________.
0 of 5 adult, it is aThe group of amphibians that can cover relatively large distances on land most rapidly is the _________________________.
0 of 5 adult, it is aList the four characteristics of chordates.
0 of 5 adult, it is aIn vertebrates, how does the front end of the spinal cord differ from the rear end?
0 of 5 adult, it is aWhy are vertebrates classified as chordates even though most adult vertebrates lack a notochord?
0 of 5 adult, it is aHow do lancelets move?
0 of 5 adult, it is aWhy is a gradual deterioration of a habitat in a specific place more likely to harm most adult tunicates than adult lancelets?
0 of 5 adult, it is aIdentify one feature of early fishes from the Cambrian Period that was probably useful as a defense against predators.
0 of 5 adult, it is aDescribe the structure, and list two functions of, the pyloric ceca of fishes.
0 of 5 adult, it is aDistinguish between anadromous and catadromous fishes.
0 of 5 adult, it is a
How does the amount of blood that leaves a fish’s atrium in one minute compare with the amount that leaves the ventricle during the same period of time?
Figure 30–3 adult, it is a
0 of 5 adult, it is aTo which of the three main groups of fishes do each of the animals in Figure 30–3 belong?
0 of 5 adult, it is aDescribe the composition of the skeleton of each fish in Figure 30–3.
0 of 5 adult, it is a
Fossil evidence indicates that animal X had a backbone, four limbs, a long tail, and an overall length of about 4.5 meters. Its skin appears to have been smooth, and its toes did not have claws. It resembled a present-day coelacanth. During which geologic period did this animal probably first appear?
0 of 5 adult, it is aList two adaptations of early amphibians that helped them live on land.
0 of 5 adult, it is aHow can an amphibian see underwater without damaging its eyes?
0 of 5 adult, it is aWhat are the three groups of modern amphibians?
0 of 5 adult, it is aContrast the structure of an adult lancelet and an adult tunicate.
0 of 5 adult, it is aDescribe the basic characteristics of fishes, and cite two examples of fishes that do not share all of these characteristics.
0 of 5 adult, it is aExplain how jaws were a useful adaptation for early fishes.
0 of 5 adult, it is aWhich group of early fishes is thought to have evolved into the first true land vertebrates? What evidence supports this idea?
0 of 5 adult, it is aName the five main parts of a fish’s brain, and describe the function of each part.
0 of 5 adult, it is aHow would you go about classifying a previously unidentified species of fish into one of the three major groups of fishes?
0 of 5 adult, it is aDescribe the basic characteristics of amphibians, and cite three examples of amphibians that do not share all of these characteristics.
0 of 5 adult, it is aHow are worldwide amphibian populations changing today? What explanations have been proposed to explain the change?
0 of 5 adult, it is aDescribe the circulation of blood through the body of an adult amphibian. Include the chambers of the heart in your description.
0 of 5 adult, it is aDescribe the changes in structure and behavior that occur as a frog develops from a larva into an adult.