The process of diffusion requires?

a. a cell membrane

b. an aqueous solution

c. a diffrence in the concentraion of molecules throughout a space

d. all of the above

Decrease in areas covered in snow and ice leads to an increase in the absorption of insolation because exposed land surfaces are

When a bacterium damages humans belong cells and causes tuberculosis the human cells that affected in the lungs are?

If a hurricane destroyed a whole u. s city, what category would it most likely be?

1. What is the difference between a reflex behavior and instinctive behavior? Describe reflex behaviors and instinctive behaviors that humans possess.

What two kinds of evidence are used to classify organisms

A hiker climbs a hill. How does the potential energy of the hiker change as she climbs higher?

Match the following events with the appropriate stage / process of cell division: Centrosome movement Homologous chromosomes separate DNA exchange Chromatids separate A. Prophase I B. Anaphase I C. Crossing over D. Anaphase II E. Prophase II F.

What are the 3 smaller parts of an atom? what are their charges?

List five invertebrate groups in the animal family tree

Where does the energy that drives the water cycle come from