1. In your own words define natural selection? (4 points)

2. What is the difference between natural selection and artificial selection? (4 points)

3. Label each one of the following graphs: Disruptive, Stabilizing, Directional. Which of the following charts
epresents a population that could potentially experience speciation? (4 points)

4. There are three types of reproductive isolation: Temporal Isolation, Geographic Isolation, and
Behavioral Isolation. Define each of these. (3 points)

Match each of the three types to one of these.
5. Using different mating calls to attract their mate. _
6.The populations' mating and nesting grounds are separated by the river. _
7. One population's mating season is spring while the other is fall. _

You have been asked to lead a demonstration for the undergraduate microbiology lab course about the uses of negative staining when studying bacteria. a "negative" stain does not stain the bacterial cell itself but stains the space between cells. under magnification, the acidic (negativelycharged) nature of the stain will be repelled by the negatively charged bacterial cell wall and willleave the cell colorless in a stained background. negative stains are used primarily to reveal the presence of negatively charged bacterial capsules; therefore, they are also called capsule stains. encapsulated cells appear to have a halo surrounding them. the negative stain procedure does not require heat fixation, which limits any chances of alteration in bacterial cell shape and size. the bacterial suspension is added to a drop of stain, such as nigrosin or eosin, and drawn across the glass slide using a coverslip.nigrosin staining-not safranin staining-of klebsiella pneumoniae will allow for the visualization of the cell shape and the determination of the presence of a capsule.true/false

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

Apuppy’s tendency to chew is inherited through which of the following? a. through learned behavior b.through genes c. through seasonal cycles d. through hibernation