Billy is sitting in a chair in class. if the action force is the downward push of his weight on the chair, what is the reaction force?
a. there is no reaction force
b. the upward force of the chair pushing on billy
c. the downward force of billy's weight on the earth
d. the upward force of the earth on billy

My question says on my assignment. read the following scenarios and decide which of the properties of life are being described. the first one is. katherine stopped on the way to school to grab some donuts. 2. because a dog cannot sweat, it has to pant in order to stay cool. 3. an elephant trun had no bone but 4,000 muscles. i have no idea what i am supposed to anwer. i can't find the answer in my notes or book that i can understand anyway

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

During the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.