Phrases such as "slow down! " "look up! " and "key point! " are all examples of:

These are examples of interjection. Interjection is a part of speech that denotes feeling and emotion. For instance, “that hurts!”, “cool!” and “beautiful!”. If noticed, these are accompanied by an exclamation point which highlight the authors point of emotion with respect to their statement. 

haploid cells;

b.have there own function.