Questions

The plant cell organelles, "The power house of the cell" mitochondria and the chloroplasts contains their own DNA and ribosomes.

Opportunity cost is the cost of other alternative choices for making your interested choice of work. Oppurtunity cost is also called as alternative cost.

For example on a holiday, you have two choices to do, either you can go to movie or a function. And if you chose to go to moavie, the oppurtunity cost of going to movie is the value that would have gotten if you had gone to function.

The law of increasing opportunity costs states that as you increase production of one good, the opportunity cost to produce an additional good will increase.

Tennis rackets and ballpoint pens are two independent goods. Since, one doesn't depend on the other.