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

Biology & Microbiology

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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

Biology & Microbiology

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.

Biology & Microbiology

People with Turner syndrome have ________ chromosome constitution.

A) XX B) XXY C) XO D) XXX

Biology & Microbiology

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

Biology & Microbiology