Step-by-step explanation:
Before the industrial revolution, most of the moth population had white wings. During and after the industrial revolution, the moth population has evolved to have a majority black population. This happened due to changing natural selection pressures. The black moths were able to camouflage in the ‘dark environment’ caused by soot from the industrial revolution. The moths were less linly to be preyed on compared to white moths that stood out in the ‘black’ environment. Over a generation, the allele for white-color, because it offered a disadvantage, becomes ‘weeded out’ of the population.
Answer:
Just count the number of zeros:
Step-by-step explanation:
There are 4 zeros, so the answer is 5 x 10^4.
Answer:
The hyperbola has two directrices, one for each side of the figure. You can see the hyperbola as two parabolas in one equation. So, as parabolas have directrix, hyperbolas does too.
The directrices are perpendicular to the major axis. That means if the parabolla is horizontal, then its directrices are vertical, and viceversa.
Therefore, to find the right line that forms the directrix of a hyperbola, you just need to use the directrix that is perpendicular to the major axis.
Answer:
No
Step-by-step explanation:
The subsets of {b, d} are {}, {b}, {d}, {b, d}. Thus the subsets of interest to you are
... {a, e}, {a, b, e}, {a, d, e}, {a, b, d, e}
_____
We know your final sets will include {a, e}, so they're not part of the variable portion of the subsets. We know c is not included, so we can leave it out of consideration. That leaves only b and d included (or not) in the variable portion of the sets of interest. We only needed to find all the ways that we could have b or d or neither or both, that is, the subsets of {b, d}. Then we form the union of each of those subsets with {a, e}.