What chemical that is released by the brain makes a person feel good?

Imagine that certain laws of physics could be ignored and you were able to travel vast distances in moments. now imagine that you traveled to an earth-like planet located light-years away that is known to support life. think about what you’ve learned in this unit and make an argument for what you think would be the dominant type of life form on this planet. consider whether a notochord is required for an organism to manipulate its environment and become a dominant creature.

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

People with one sickle cell allele are not likely to get malaria. what is this an example of?