A farmer in Vermont is going to tap a tree in order to make maple syrup. Which of the following plant structures must the farmer break to release (and collect) the sugar-rich base for his syrup?

A. phloem
B. xylem
C. cuticle


A

Biology & Microbiology

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Once a prion enters a nerve cell, it essentially

A) assumes the correct folding orientation for the protein. B) stops the cascade of misfolding events associated with adjacent cells. C) becomes self-propagating, causing misfolding of nearby normal proteins. D) differentiates into a nonreplicating virus. E) differentiates into a replicating virus.

Biology & Microbiology

This is the process a cell goes through to become a particular cell type, based on the proteins that it expresses and is more-or-less a permanent condition. 

A. differentiation B. somatic cell transfer C. discrimination D. determination

Biology & Microbiology

The roots of about 10% of all kinds of plants are involved in symbiotic associations with certain kinds of fungi.

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

Biology & Microbiology

Which type of connective tissue holds bones together?

A. Tendons B. Intercellular junctions C. Ligaments D. Cartilage E. Collagen

Biology & Microbiology