Photosynthesis reduces the leaf's internal concentration of:

a. hydrogen.
b. carbon dioxide.
c. nitrogen.
d. oxygen.
e. sugars and starches


b

Biology & Microbiology

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When water melts from a solid ice cube to a liquid, its volume ________ and its mass ________.

A. Decreases; increases B. Decreases; stays the same C. Increases; stays the same D. Increases; decreases

Biology & Microbiology

Root systems that are adapted to absorb water and nutrients from the upper layers of soil are called a(n) ____

a. adventitious root systems b. prop root systems c. fibrous root systems d. taproot systems e. storage root systems

Biology & Microbiology

If a population shows little or no evolutionary change for millions of years it is said to be in a state of ________

a. adaptive radiation b. stasis c. extinction d. decline e. evolution

Biology & Microbiology

You are attempting to determine which step of prokaryotic translation a new antibiotic inhibits. You have determined that the antibiotic interacts with a translational factor but need to identify which one

If the new antibiotic interferes with elongation, which of the following factors could be a potential site of action? A) IF3 interaction with an aminoacyl tRNA B) EF-Tu placement of N-formylmethionine onto the ribosome C) EF-Tu interaction with an aminoacyl tRNA D) EF-Ts translocation of tRNAs from the A site to the P site E) All of these could be potential sites of action.

Biology & Microbiology