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Which of these is NOT a characteristic of all animals?
All of these are characteristics of all animals
The great size and mobility of the vertebrates is associated with ________
The heartworms that can accumulate within the hearts of dogs and other mammals have pseudocoelom, a digestive tract, and other covering that is occasionally shed. To which phylum does the heartworm belong?
Which of the following characteristics explains why insects are so successful at dispersing to distant environments?
Protostomes that have an open circulatory system and an exoskeleton of chitin are part of which phylum?
Protostome animals that have a unique tissue that secretes a calcium carbonate shell around themselves are the
Which of these are characteristics of all chordates during at least a portion of their development?
A, B, and C
The leeches used by doctors to prevent blood clotting and stimulate blood vessel growth in patients recovering from reconstructive surgery are members of the phylum
Birds are now included in the _______ phylum, which they resemble in having scales on their legs and number of the same internal organs
Reptilian embryos will not dry out in a desert habitat because
reptiles produce shelled amniote eggs
The animals most like the ancestral protozoan colonies that likely gave rise to animals are:
A radially symmetrical animal that has two embryonic tissue layers probably belongs to which phylum?
What is the single unique characteristic that distinguishes the birds from other living vertebrates?
Adult tunicates resemble invertebrate animals more than they resemble vertebrates. Why are they classified as chordates?
tunicate larvae have all of the above characteristics
The phylum Nematode includes very common animals; some are parasitic and are often found in soil
A grasshopper has an elaborately branching system of tubes within its body used for gas exchange. These tubes are called
Lampreys have reduced the sizes of many commercial fish populations in the Great Lakes because they
are parasites on those fish species
Segmentation is importnat in the evolution on animals because
it allows for specialization of function
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