One of the two major distinguishing characteristics of mollusks is

a. the presence of three body regions.
b. the mantle.
c. segmentation of the body.
d. jointed appendages.


d

Biology & Microbiology

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Embryonic plants are nourished by nutrients in endosperm and the ____, but not by nutrients in fruits

a. cotyledons b. seed coat c. germ d. bran e. ovary wall

Biology & Microbiology

Competition between species is called ____________ competition. 

A. interspecific B. exploitative C. interference D. fundamental E. intraspecific

Biology & Microbiology

Meningitis may be diagnosed by analyzing a sample of

a. brain tissue. b. CSF. c. blood. d. spinal cord. e. meninges.

Biology & Microbiology

Which of the following is diagnosed by detection of antibodies against the causative agent?

A) nongonococcal urethritis B) gonorrhea C) syphilis D) lymphogranuloma venereum E) candidiasis

Biology & Microbiology