Two atoms appear to have the same mass number. these atoms
a) must have the same atomic number.
b) must have the same number of electrons.
c) must have the same chemical properties.
d) must have the same number of protons + neutrons.
e) must have the same atomic number, the same number of protons + neutrons, the same number of electrons, and the same chemical properties.

After reading the paragraph below, answer the questions that follow. researchers have created a robot that has a very thin leg that is moved by cardiac (heart) cells contracting in unison. the robot, made of a polymer similar to that used in making contact lenses, is bathed in heart cells with supporting cells, which then attach to the robot and provide movement as they contract. all of the cardiac cells working together can cause the robot leg to move in a way that individual cells could not. this is an example of a. emergent properties of cells. b. energy flow through an ecosystem. c. adaptation. d. internal environment regulation.

In what part of a chloroplast does glucose production occur? a. atp synthase b. photosystem ii c. photosystem d. stroma

What are the two main phases of a cell cycle