What are species of Rhizobium and Bradyrhizobium bacteria most directly associated with?

a. nitrification
b. ammonification
c. nitrogen cycling
d. nitrogen fixation


Ans: d. nitrogen fixation

Biology & Microbiology

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Sons of a cross between a white-eyed male and a red-eyed female always have red eyes

A. true B. false

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The life cycle of a sexual reproducing organisms includes:

A. mitosis and meiosis. B. mitosis, meiosis, and fusion of the gametes. C. meiosis and fusion of gametes D. only mitosis E. only meiosis

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Four of the five items listed below are cytoplasmic

organelles. Select the exception. a. nucleolus b. mitochondrion c. ribosome d. Golgi body e. chloroplast

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The DNA sequence ATGCATGC will pair with which of the following DNA strands?

A. TACGTACG B. TACCTACC C. ATGCATGC D. TTGCATCC E. CGTACGTA

Biology & Microbiology