In a nuclear reaction, which of the following does NOT have to be conserved?

A. Mass alone.

B. Energy alone.

C. The number of electrons.

D. The combination of mass and energy.

chek all that applys.

Jawanda was playing with her new Superman bobble head. She noticed that after she pushed Superman's head it would vibrate, but after a while it would bobble less and then stop.

Eubacteria can be distinguished from archaebacteria by A. The presence of a true nucleus B. Being Multicellular C. Difference in RNA and makeup of the cell wall D. the presence of membrane-bound organelles

1. The concentration of sugar is higher inside a cell than outside the cell. The concentration of water inside the cell is lower than it is outside. Sugar cannot pass through the cell membrane.

Why is freshwater a limited resource? A. Used water can be cleaned and filtered mechanically and chemically back to freshwater. B. They hydrologic cycle constantly replenishes the global freshwater supply. C.

1) Explain why increasing the amounts of the two enzymes changed the life spans of the mice. 2) Express your opinion about whether people should be engineered to have high levels of the two enzymes.

What are at least 5 important words associated with the water cycle? What do they mean? Why are they important?

Which of the following organisms is NOT a protist? a. water molds c. Amoebas (protozoans) b. Escherichia coli d. Diatoms (algae)

A 56 year-old pro golfer is having mohs micrographic surgery for skin cancer on his forehead. the surgeon performs the surgery with two stages. the first stage includes 4 tissue blocks and the second stage includes 6 tissue blocks.

13. Excess salt is removed from the body through sweat glands in the skin, This is an interaction between systems.

a cell with 5% salt concentration is placed in a beaker with 1% salt concentration. what will happen to the cell over time