Comparing and Contrasting Which two of the rock samples were the easiest to classify? What properties made them easy to classify?

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

Acommon kind of mechanical weathering is called

The activity of the modern sample is 1.10 bq . how long does that measurement take?