Root structures that grow around and encapsulate mutualistic nitrogen-fixing bacteria are called ____.

A. hyphae
B. mycorrhizae
C. Casparian strip
D. root hairs
E. root nodules


Answer: E

Biology & Microbiology

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Which of the following is the correct organizational hierarchy, from largest to smallest, in the hierarchical order of life? (Some levels have been omitted, so you are looking for the correct order.)

A. Biosphere ? Community ? Population ? Tissue ? Organ ? Cell ? Atom ? Molecule B. Ecosystem ? Population ? Community ? Organ system ? Organ ? Cell ? Molecule ? Atom C. Community ? Ecosystem ? Population ? Tissue ? Organ ? Cell ? Organelle ? Atom D. Ecosystem ? Community ? Population ? Organ ? Tissue ? Cell ? Molecule ? Atom

Biology & Microbiology

Post-translational modification may include

A. formation of exons and introns. B. folding of the protein, often with the aid of chaperones. C. removal of the signal sequence. D. addition of glycine tags. E. folding of the protein, often with the aid of chaperones, AND removal of the signal sequence.

Biology & Microbiology

Which choice is FALSE about Addison's

disease?

a. It could be caused by low cortisol levels. b. It could be caused by tuberculosis. c. It could be caused by an autoimmune condition. d. Blood pressure and blood sugar levels can fall into life-threatening range. e. The condition is treated with synthetic aldosterone.

Biology & Microbiology

__________ and __________ are single-celled

heterotrophs with a secreted shell. Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology