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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. _________________________
The part of a fish’s brain that processes olfactory information is the ____________________, which controls voluntary movements in most other vertebrates.
One adaptation of amphibians for life on land is the presence of mucus glands in the skin, which can help protect amphibians from _________________________.
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?
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?