Members of the phylum ____ have bilaterally symmetrical larvae but exhibit secondary radial symmetry as adults, usually organized around five rays, or "arms."
a. Hemichordata
b. Echinodermata
c. Cnidaria
d. Arthropoda
e. Chordata
B
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Vertebrates and tunicates share _____
A) jaws adapted for feeding B) a high degree of cephalization C) the formation of structures from the neural crest D) an endoskeleton that includes a skull E) a notochord and a dorsal, hollow nerve cord
Systemic acquired resistance is
A. a broad-ranging resistance that lasts for a period of days. B. the same as the human immune response. C. a response whereby antibodies recognize specific antigens. D. a response that occurs when the hypersensitive response fails. E. a method for plants to modify their DNA for protection.
People with Turner syndrome have ________ chromosome constitution.
A) XX B) XXY C) XO D) XXX
What is the probability that the offspring of a cross between a homozygous recessive parent and heterozygous parent will be homozygous recessive?
A.) 1/1 B.) 1/2 C.) 1/4 D.) 1/8