PLEASE HELP IT IS A TIMED TEST!! The amount of chemical pesticide, known as DDT, increased in concentration
from the first trophic level to the fourth trophic level. This is an example of a
pollutant that...

A. biologically accumulates (magnification)

B. shows exponential growth.

C. biologically decomposes.

D. shows logistic growth.

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.

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.

Which feature of a human community is similar to a niche in a biological community