Answer the following statements true (T) or false (F)

1. Many new, previously unsuspected species have been discovered through application of the molecular technique of DNA sequencing.
2. Archaea that tolerate and/or require high salinities are called halophiles.
3. Heterocysts are specialized cells in plant roots that contain nitrogen-fixing bacteria.
4. Various anaerobic Archaea that convert carbon dioxide and other carbon-bearing compounds into methane are called methanotrophs.
5. Type III and Type IV systems are potentially applicable to treatment of human disease by using them to deliver DNA to target cells in human gene therapy.


1. TRUE
2. TRUE
3. TRUE
4. FALSE
5. TRUE

Biology & Microbiology

You might also like to view...

Propose an experiment to identify members capable of assimilating monomers of lignin within a microbial community

What will be an ideal response?

Biology & Microbiology

Monocots demonstrate which of the following characteristics? Select all correct choices

A. vascular bundles located around the outer circumference of the stem B. a vascular cambium that produces secondary xylem C. new roots that consistently form at the bases of stems D. nodes giving rise to single leaves

Biology & Microbiology

How many electrons will be found in the 2nd orbital shell of Carbon?

a. 2 b. 3 c. 4 d. 5 e. 1

Biology & Microbiology

Despite dramatic differences in appearance, size, and behavior, you are surprised to find that two organisms you have been studying are able to reproduce successfully, and produce fertile offspring. Which of these choices is the largest taxonomic category that these two organisms share in common?

a. subspecies b. species c. family d. genus

Biology & Microbiology