What is an isolated system?
A. A collection of matter that does not interact with anything else in
the universe
B. The system in which collisions always occur
C. The forces that act upon an object in a collision
D. The intergalactic highway system

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?

Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c. ozone layer hole d. increase in sea levels

How are gross production and net production different? a. net production is always greater than gross production. b. net production is always less than gross production. only animals have net production. d. only plants have net production. select the best answer from the choices provided