Nitrogen-fixing bacteria, such as cyanobacteria, can use atmospheric nitrogen (N2 ) for their nitrogen source

Indicate whether the statement is true or false


TRUE

Biology & Microbiology

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The first vertebrates are seen in the fossil record of the:

A. Ediacaran. B. Cambrian. C. Ordovician. D. Devonian. E. Jurrasic.

Biology & Microbiology

Seed plants are _____

a. flowering plants d. spermatophytes b. conifers e. tracheophytes c. gymnosperms

Biology & Microbiology

Which of the following conclusions can be made if two identical insertion sequences are identified in separate locations on a chromosome?

A. The insertion sequence was a "cut-and-paste" transposon. B. The insertion sequence was transferred via replicative transposition. C. The insertion sequence was transferred via simple transposition. D. A mutation occurred during transposition of the insertion sequence.

Biology & Microbiology

The smallest units that still remain the characteristics of an element are called

A) atoms B) molecules C) tissues D) organic molecules E) cells

Biology & Microbiology