Which of the following statements is true about mutations? A. It is a source of genetic variation
B. Rates tend to be very high in most populations.
C. It is generally lethal
D. It affects only somatic cells

Drag each description to the correct location on the image. not all descriptions will be used. describe the parts of a comet. the frozen part of the comet the atmosphere of gases and dust formed when the nucleus vaporizes tail made of small, solid dust particles tail made of ions that appears to point away from the comet's orbit

Achemical that is released by an animal as a signal to other members of the same species is called a pheromone. t or f

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