All living things are made up of cells. This concept, called the cell theory, was discovered by two German biologists, Theodor Schwann and Matthias Schleiden, and was compiled in a book by Rudolf Virchow.
In the 17th century, Robert Hooke sliced up a piece of cork and examined the pieces in a microscope. He observed objects that looked like little jail cells, and he named these objects "cells."
Hooke's observations paved the way for the development of the cell theory, which states that cells are the building blocks of all life, making up the structure of organisms and performing all the functions within organisms. Another part of the cell theory discusses that cells can only arise from pre-existing cells.Learn More
According to the Biology Department at Indiana University Southeast, all four of the primary biomolecules contain carbon. This includes nucleic acids, lipids, carbohydrates and proteins. All four of these biomolecules are large and complex molecules that take advantage of the ability for carbon atoms to form long chains.Full Answer >
Meiosis is important to eukaryotes, such as plants, animals and fungi, because it is the method by which they produce sex cells. The ability to produce sex cells, and therefore reproduce sexually, increases the genetic diversity of the population. This increased genetic diversity provides a greater pallet of mutations on which natural selection can act.Full Answer >
The basic unit of life and the smallest unit of life is the cell. Tissues are comprised of many cells, and many tissues make up organs. Every organism in the world is comprised of cells.Full Answer >
Nucleic acids are made up of three components: a phosphate, a sugar and a nitrogenous base. The specific building blocks of DNA and RNA are slightly different, but they fall into the same three categories.Full Answer >