What are the significance of helicase enzymes during dna replication?

Astudent visits the beach during a very hot day she steps on the santa and jumps because it is so hot what type of heat transfer is demonstrated by the sand in this example

The terrestrial planets are characterized by having a a.) silicate core b.) iron-rich silicate core c.) iron-rich metallic core d.) none of these

The mixture of sperm and fluids from the seminal vesicles, prostate gland, and cowper's glands is called