One histone modification that is seen consistently in many species is the addition of an acetyl group tothe twelfth lysine in the h4 protein. if you were a geneticist working on yeast and had a clone of the h4 gene, what could you do to test whether the acetylation at this specific lysine was necessary for the functioning of chromatin?

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?

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.

Study this image which statement best describes the rock shown check all that apply