The SA node, also known as the __________, spontaneously generates the action potentials that set the

pace for cardiac contractions. Fill in the blank(s) with the appropriate word(s).


cardiac pacemaker

Biology & Microbiology

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Most plants acquire minerals from

A. soil. B. air. C. digested insects. D. rain.

Biology & Microbiology

Achondroplasia, a hereditary form of dwarfism, is an autosomal dominant disorder; however homozygous dominant

individuals either die before birth or very shortly thereafter. The homozygous recessive condition is normal. A dwarf couple decide to have children. Use this information to answer the following question:Of the children of this couple who survive, what is the probability that they will be normal?

a. 0 b. ¼ c. 1/3 d. 2/3 e. ½

Biology & Microbiology

Who originally discovered the process of bacterial transformation?

A. Watson and Crick B. Chargaff C. Griffith D. Meselson and Stahl E. Hershey and Chase

Biology & Microbiology

Which of the following is NOT a fruit?

Select one: a. corn kernel b. peas and beans c. tomato d. cucumber e. onion

Biology & Microbiology