Beth learned in her science class that white blood cells in the human body capture harmful material by engulfing them. then they digest then using enzymes, thus protecting the body from infection. which eukaryote has a similar mode of nutrition

The zone, which exists from a depth of 0 to 600 feet, is home to the majority of ocean life.

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

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.