Answer:
Frequency of individuals with recessive trait(dd)
%
Explanation:
Please see the attached.
In the image it is clear that there are total 
mouse out of which 
are dark colored.
Since dark color allele is dominant, these dark colored mouse will have genotype either DD or Dd
The individuals with genotype "dd" will be of light color.
Number of light colored mouse 
Frequency of individuals with recessive trait(dd)
%
So it doesn't accidently get caught and knocked off the table.
The answer is c) ocean waves
1)magnification goes by 10x (read 10 times), 100x,1000x and some goes 10,000x
2)Always focus first using lowest power possible first, switch to medium power (100x) after it's focused on low power(10x), on 100x, use the small knob to focus it more. DO NOT touch the bigger nob when in medium or high power. Switch to high power (100x) when it is focused on medium power, again focus again using the small knob on high power.
3) So it doesn't gather dust and fog up the lense? that one should be self explanatory
