Streptococcus pneumoniae is a kind of bacterium that what? a. causes infections in humans. b. causes several types of cancer. c. supports the human immune system. d. aids in the digestion of food

What materials must dams have to produce electricity, and what must occur?

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?

You are given an electron micrograph of a bacterial cell. in the micrograph you can clearly see three thin layers of different densities surrounding the cell. based on the micrograph, you can infer that this cell is and would appear after application of the gram stain procedure. gram-negative / pink gram-positive / purple gram-positive / pink gram-negative / purple