Populations of all organisms change from one generation to the next because their DNA changes over

time. This is known as:



a. artificial selection.
b. biological evolution.
c. natural selection.
d. artificial selection and natural selection only
e. developmental selection.


B

Biology & Microbiology

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The cells wall of bacteria Z contains high concentrations of phospholipids along with proteins and relatively low amounts of  lipopolysaccharide. When bacteria Z is gram stained, it will most like be colored?  

A.  Purple B.  Pink C.  Blue D.  Clear, it does not retain any stain Clarify Question · What is the key concept addressed by the question? · What type of thinking is required?   Gather Content · What do you already know about gram staining? How does it relate to the question?   Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?   Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Biology & Microbiology

The _____ of a solution takes into account ALL of the solutes in the solution

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

____, which are a cell type found in xylem, are extremely efficient in conducting water

a. Sieve tube elements b. Companion cells c. Tracheids d. Sclereids e. Vessel elements

Biology & Microbiology

An organism that ferments glucose via the mixed acid fermentation pathway will be:

red in the methyl red test red in the phenol red glucose red in the Voges-Proskauer test red in the nitrate reduction test

Biology & Microbiology