The fast and long-distance movement of mitochondria along the axon of animal nerve cells is thought to be facilitated mainly by the motor proteins dynein and kinesin. Which (if any) of the following drugs is / are expected to reduce movement of mitochondria between the cell body and the terminal branch of an axon in animal nerve cells? a. YES/NO Excess 3-O-methyl glucose in the medium (prevents glycolysis by reducing glucose use by cells).
b. YES/NO FCCP (inhibits mitochondrial production of ATP).
c. YES/NO Cytochalasin D (disrupts actin filaments) activity)
d. YES/NO BDM (inhibits myosin motor activity)

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

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

As the human population grows, what happens to our natural-resource requirements? o they increase o they decrease o they do not change. they go in cycles