Answer:
3rd option - humans chose the potential parents for crosses based on desired characteristics.
Explanation:
Artificial selection is the identification by humans of desirable traits in plants and animals, and the steps taken to enhance and perpetuate those traits in future generations.
- <span>they are always formed by a cation and a anion
- they transfer electrons rather than shared
- all are binary ionic compounds are solids
- they are neutral i.e. no charge</span>
Studying will help alot, study the content you dont understand. Ask your teacher for help, pay attention in class. What helps me the most is taking notes, writing things down is one of the best ways to remember content.
Even though the numbers are in scientific notation, they are still just numbers. Essentially the question is as simple as "An apple weighs an ounce, how much do 35 apples weigh?". So all you have to do is multiply.
3.25 x
x 6.0 x
= 195