14. Leaves of many plants have surfaces made up of a biomolecu e that is not water-permeable to help reduce water loss. How does this biomolecule differ from other types of biomolecules?

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi,r^3 , where r is the sphere’s radius.

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel