Which of the following is a legume involved in housing nitrogen-fixing bacteria?

A. grass
B. ferns
C. beans
D. roses
E. oak trees


Answer: C

Biology & Microbiology

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If an organism is isolated that has no nuclear membrane and the DNA is condensed into a body in the cytoplasm, this organism would most likely be classified as

A) a prokaryote. B) a eukaryote. C) a pathogen. D) either a eukaryote or prokaryote.

Biology & Microbiology

Sampling error can be minimized by which one of the following?

a. using a large sample size b. conducting the experiment or observation only once c. throwing out data that does not fit the conclusion d. using a small subset of a larger population e. carefully selecting samples to match the prediction

Biology & Microbiology

The primary difference between enhancers and promoter-proximal elements is that enhancers _____

A) are transcription factors; promoter-proximal elements are DNA sequences B) enhance transcription; promoter-proximal elements inhibit transcription C) are at considerable distances from the promoter; promoter-proximal elements are close to the promoter D) are DNA sequences; promoter-proximal elements are proteins

Biology & Microbiology

A ring of vascular bundles in a stem is characteristic of:

A) monocots. B) non-flowering seed plants. C) many dicots. D) both monocots and dicots.

Biology & Microbiology