What are the two ways that organisms on the bottom of deep sea food chains acquire energy?
a. photosynthesis and chemosynthesis
b. chemosynthesis and marine snow
marine snow and photosynthesis
d. chemosynthesis and predation

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.

How can you tell the difference between rough er from smooth er?

Iwanna go do something with my ideas? ?