Inhaling a foreign substance into the upper respiratory tract can cause

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt