In which of the following ways are DNA and mRNA similar? a.) They are both always kept in the nucleus to keep them safe from damage.
b.) They are both double stranded and must be unzipped during replication and transcription
c.) They both contain the entire genetic sequence of the original DNA from their parent cell.
d.) They both copy genetic code by forming a complementary sequence of nucleotides with an existing strand of DNA.

answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation:

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.