The central nervous system is lacking in animals that have _____

A) a complete gut
B) bilateral symmetry
C) radial symmetry
D) a closed circulatory system
E) excitable membranes


Answer: C

Biology & Microbiology

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Which of the following cause rat-bite fever, or Haverhill fever, which is characterized by acute onset of chills, fever, headache, vomiting, and severe joint pains, as well as a rash on the palms, soles of the feet, and other extremities?

a. Streptobacillus moniliformis b. Brucella abortus c. Bordetella spp. d. Pasteurella spp.

Biology & Microbiology

Approximately ____% of a person’s 3 billion nucleotides are unique to that individual

a. 1 b. 5 c. 10 d. 25 e. 50

Biology & Microbiology

During capacitation, sperm become mature

____________________ Indicate whether the statement is true or false.

Biology & Microbiology

Oxidation involves the ________ , and reduction involves the

A) loss of electrons; gain of electrons B) loss of oxygen; gain of oxygen C) gain of electrons; loss of electrons D) gain of oxygen; loss of oxygen

Biology & Microbiology