Which of the following explains why selection can cause populations of organisms to change?
a. It teaches organisms how to survive better in their environments. b. It allows some organisms to survive and produce offspring while others do not.
c. It causes changes in organisms to help them in their everyday lives.
d. It chooses certain organisms with good traits over other organisms with bad traits.

Which term best describes a community in which people work mostly in factories? a.agricultural. b.hunting and gathering. c.domesticated. industrial.

During which phase does earth see more than half of the moon's surface? 1)first quarter2)third quarter3)waxing gibbous4)waning crescent

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.