In self- pollination, there is no diversity in the genes and therefore the purity of the race is maintained.
The plants do not depend on external factors for pollination and even smaller quantities of pollen grains produce have a good success rate in getting pollinated. In the case of cross-pollinating plants, there is a threat of the entire crop dying out if there are no pollinators to facilitate the process. The disadvantage of self-pollinating flowers and plants is that there is little genetic diversity because the same genes are passed down from the parent plant to the offspring.
The best time to determine voice & tone in writing is when you are in the beginning/middle of the passage/book/article because you will see what the author is going to talk about and then how he feels about it.
The sentence <em>The forecast said it will rain today </em>is declarative, as it is informing us that something is happening, you would use it to declare something you want to be known.
Interrogative sentence ends with a question mark.
Imperative sentence is used to order somebody to do something.
Exclamatory sentence ends with an exclamation mark.
