Of the following choices, which would require the cell to expend energy to move it across the membrane?

water

oxygen

carbon dioxide

protein

Which statement best explains why cells were observed in more detail using a compound microscope than a simple microscope? A compound microscope has greater magnification ability than a simple microscope.

Why would pushing a wooden block across a rough surface make the block warm?

Proposed answer to a scientific question. A. Homeostasis B. Hypothesis C. Theory D. Protein

If the sunlight is equal on all parts of the earth what season it'll be?

The Gakkel Ridge is an area where two ocean tectonic plates are diverging. What can you conclude is happening in this area?

What is a cell how does it effect the body

A farmer crossed a yellow maize plant (Yy) with another yellow maize plant (YY). He planted 200 seeds from this cross. How many of the plants would be yellow?

How do the methods of scientists lead to knowledge?

Actions you do without thinking about them

Joe begins to experience mood swings and disturbed thirst and hunger. Imaging studies indicate that a brain tumor is the likely cause of these disorders. In what part of the brain is the tumor most likely located?