Answer:
<u>Case I
</u>
Magnification is the ability of a microscope to magnify the object for an enlarges vision.
The magnification of a microscope is calculated by multiplying the lens power of the objective lens to the lens power of the eyepiece.
Magnification= objective lens (power) X eyepiece ( power)
<u>Case II
</u>
To focus a microscope using a lens of high power in the following way:
1. Place the specimen slide on the stage.
2. Turn the revolving turret and focus the lens over the specimen.
3. Look at the stage and the objective lens from the side and move the stage upward.
4. Move the object as up as it can go taking care of that objective lens do not touch the coverslip.
5. Move the focus knob until the image comes into focus after viewing from the eyepiece.
The precaution that should be taken is that keep the high power lenses away from the light.
Answer:
Its molecules are farther apart in the solid state than in the liquid state.
Explanation:
Unlike most other liquids that reduce in volume with decrease in temperatures, when water goes below 4 degrees centigrade, the volume begins to increase. This is due to the way the water molecules arrange themselves in ice. Water molecules are polar and align themselves with regards to their dipoles. The partially positive hydrogen ends tend to place themselves some distance between two partially negative oxygen ends of the adjacent molecules. This pushes the molecules farther apart in crystalline (solid) form than in liquid form.
1) Living parts (animals, bacteria, plants, etc.)
2) Abiotic Factors (nonliving parts- mulch, rocks, waterfalls)
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Answer:
When HIV infects a cell, it first attaches to and fuses with the host cell. Then the virus uses the host cell's machinery to convert the viral RNA into DNA and replicate itself. The new copies of HIV then leave the host cell and move on to infect other cells.
Answer:
Acids
Explanation:
Acids are ionic compounds that produce positive hydrogen ions when dissolved in water. Acids taste sour. They conduct electricity when dissolved in water. They also react with metals to produce hydrogen gas.
