What causes cell differentiation during an organism's development?

Which of the following is a method used to obtain the absolute age of a rock or fossil? A.) Original horizontality B.) Radiometric dating C.) Superposition D.) Unconformities

Which process is characterized by the movement of particles from an area of high concentration to an area of low concentration across the plasma membrane without the use of energy?

What happens when the spinal cord is injured? A. The parts of the body using the damaged areas lose sensation. B. The affected neurons in the CNS regenerate gradually. C. The path of impulses in the nervous system may be disrupted. D.

PbCl2 Pb + Cl2 Does the chemical reaction shown above obey the law of conservation of mass? A. Yes, because the moles of Cl2 and Pb are equal. B. Yes, because the equation is balanced. C. No, because a new molecule is produced. D.

In what way are the bacteriophage and E. coli alike

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