Coal is a source of energy that is abundant in Pennsylvania. What is one
disadvantage of this type of energy supply?

B

Explanation:

Coal is a nonrenewable souce of energy.  This means that it will eventually run out because we use it so often that nature cant replace it fast enough that we have infinite amounts of it

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.