Answer:
The correct answer is: enhanced zones of inhibition in the area between two adjacent disks.
Explanation:
- According to the question, the two antibiotics show the property of Synergism.
- Synergism can be defined as the property of two drugs, where the efficiency of activity (killing the bacteria) obtained on using the two drugs together is far more than the efficiency obtained by using individual drugs separately.
- In the disk diffusion method, the efficiency in activity (killing of bacteria) of two drugs is determined by plating a nutrient agar media with the particular target bacteria and adding the two antibiotics in two discs separated from each other by a certain distance.
- Both the antibiotics diffuse into the agar media from the discs and kill the target bacteria.
- Zone of inhibition can be defined as the circular clear zone on the nutrient agar plate obtained after allowing the bacteria to grow for the required period of time. This is the region where no bacteria grow as they are killed by the antibiotics used.
- Depending upon the efficiency of the antibiotic used and also its ability to diffuse into the nutrient agar medium, bacteria tends to grow near the periphery of the nutrient agar plate where the antibiotic fails to reach.
- In the question, as the two antibiotics used show synergistic effect, the region on the nutrient agar plate in between the two discs, where both the antibiotics are able to percolate will show a larger zone of inhibition.
Answer:
transpiration; evaporation
Explanation:
Definitions:
transpiration - the process of water movement through a plant and its <u>evaporation</u>
evaporation - the process of turning from liquid into vapor <u>(and releasing it into the air)</u>
BOTH of these processes include releasing water into Earth's atmosphere.
The lobe of the cerebral cortex of the brain responsible for most higher cortical functions such as thought processing, consciousness, and voluntary movement is the frontal lobe. The frontal lobe is also involved in other cortical functions such as judgement, calculation, and impulse.
<em>The specific area for thought processing is the Brodmann area 45 in the inferior frontal gyrus. The specific area for voluntary movement is Brodmann area 6 in the premotor cortex. There is no specific area for consciousness in the frontal lobe.</em>
Daughter cells created in meiosis are genetically identical to parent cells.
Answer:
The two properties that determine the conduction velocity in a mammalian neuron are <em>myelination</em> and <em>voltage-gated Na+ channel concentration.</em>
Explanation:
When the electrical stimulus is applied to the membrane of the axon it produces depolarization by activating the sodium voltage-dependent channels all along the axon. Besides, there is an increase in sodium permeability. Depolarization propagates to inactivated regions adjacent to the membrane opening more sodium channels.
There is a directly proportional relationship between the fiber diameter and the conduction velocity. Mielinized fibers are thick and their conduction velocities are very fast.
The conduction velocity increases substantially in myelinated fibers because of the high concentrations of sodium channels in the Ranvier nodes that are not myelinated areas and the diameter of the axon becomes thinner.
