The stem of a plant is made of several types of tissue that work together. Which type of structure is the stem of a plant?
a: cell
b: tissue
c: organ
d: organ system

What are the charges of the subatomic particles by choosing the answer from the drop down menu. protons have a (+1,0,or-1). (protons,neutrons,electrons) have a 0 charge. 3.) electrons have a (+1,0,-1)

Which of the dna typing techniques do you think you would choose if you had to analyze a dna sample? why?

Which buffer would be better able to hold a steady ph on the addition of strong acid, buffer 1 or buffer 2? explain. buffer 1: a solution containing 0.10 m nh4cl and 1 m nh3. buffer 2: a solution containing 1 m nh4cl and 0.10 m nh3