I need help.?

Question

Can you please help with this question. I called my friend but she doesnt get it either. The question is:
why is the cell theory considered one of the greatest unifying concepts in biology?

Answer 1

All living organisms are composed of one or more cells.
The cell is the basic unit of the organization of living things.
All cells come from pre-existing cells.

Answer 2

Robert Hooke (1635-1703), one of the first scientists to use a microscope to examine pond water, cork and other things, referred to the cavities he saw in cork as "cells", Latin for chambers. Mattias Schleiden (in 1838) concluded all plant tissues consisted of cells. In 1839, Theodore Schwann came to a similar conclusion for animal tissues. Rudolf Virchow, in 1858, combined the two ideas and added that all cells come from pre-existing cells, formulating the Cell Theory. Thus there is a chain-of-existence extending from your cells back to the earliest cells, over 3.5 billion years ago. The cell theory states that all organisms are composed of one or more cells, and that those cells have arisen from pre-existing cells.

James Watson (L) and Francis Crick (R), and the model they built of the structure of DNA. Image from the Internet.

In 1953, James Watson and Francis Crick developed the model for deoxyribonucleic acid (DNA), a chemical that had (then) recently been deduced to be the physical carrier of inheritance. Crick hypothesized the mechanism for DNA replication and further linked DNA to proteins, an idea since referred to as the central dogma. Information from DNA "language" is converted into RNA (ribonucleic acid) "language" and then to the "language" of proteins. The central dogma explains the influence of heredity (DNA) on the organism (proteins).

Homeostasis is the maintainence of a dynamic range of conditions within which the organism can function. Temperature, pH, and energy are major components of this concept. Theromodynamics is a field of study that covers the laws governing energy transfers, and thus the basis for life on earth. Two major laws are known: the conservation of matter and energy, and entropy. These will be discussed in more detail in a later chapter. The universe is composed of two things: matter (atoms, etc.) and energy.

Answer 3

Because all living things have cells and this one theory covers all living things, which makes it a unifying concept. It may even be the only one!

Answer 4

Cause we started off as a single cell, which mulitplies, over and over, to create our very being. It is amazing, our hearts, liver, brain, kidneys, eyes nose, etc, etc, all started off from a single cell. Cancer is a mutant cell, that multiplies, to a tumour. Your blood is made from cells, red and white cells, lukeamia, is an abnormal condition, where the white cells take over, and kill the red cells, which you need. An embryo, is a cluster of cells, that evolves into a human being. We are cells, one of the greatest unifying concepts of biology.

Answer 5

One of the main points of the cell theory was that The cell is the unit of structure, physiology, and organization in living things.
Before people thought that things just appread out of thin air

Answer 6

The cell theory states that all organisms are composed of one or more cells....get it?

Answer 7

if scientists didnt kno the cell theory (all cells are the building blocks of life) then they wuldnt kno anything at all

Answer 8

you need help in biology with the biology teacher's homework

Answer 9

Because it all created life..

Answer 10

i dunno!!!!!