I have a couple of cell questions?

Question

Can you tell me the diffrence between prokaryotes and eukaryotes
Also what is the cell theroy?

Answer 1

There are two general classes of cells: prokaryotic and eukaryotic. The evolution of prokaryotic cells preceded that of eukaryotic cells by 2 billion years.

Humans, of course, are an example of multicellular eukaryotes.
The major similarities between the two types of cells (prokaryote and eukaryote) are:
They both have DNA as their genetic material.
They are both membrane bound.
They both have ribosomes .
They have similar basic metabolism .
They are both amazingly diverse in forms.
The major and extremely significant difference between prokaryotes and eukaryotes is that eukaryotes have a nucleus and membrane-bound organelles , while prokaryotes do not. The DNA of prokaryotes floats freely around the cell; the DNA of eukaryotes is held within its nucleus. The organelles of eukaryotes allow them to exhibit much higher levels of intracellular division of labor than is possible in prokaryotic cells. Additional obvious differences between prokaryotes and eukaryotes include:

Size
Eukaryotic cells are, on average, ten times the size of prokaryotic cells.
Genomic composition and length
The DNA of eukaryotes is much more complex and therefore much more extnsive than the DNA of prokaryotes.
Cell Wall
Prokaryotes have a cell wall composed of peptidoglycan, a single large polymer of amino acids and sugar . Many types of eukaryotic cells also have cell walls, but none made of peptidoglycan.


Cell theory :
1.All organisms are made up of one or more cells.
2.The cell is the fundamental unit of structure and function in living things.
3.All cells are essentially the same in chemical composition

Answer 2

The difference between prokaryotes and eukaryotes is that prokaryotes lack membrance bound organelles and a nucleus whereas eukaryotes possess a membrane bound organelle and a nucleus. There are other differences but they are more difficult to settle out because of the relationship of eukaryotes with the prokaryotic domain Archaea.

Cell theory has many tenets but here are the main ones:
1. New cells arise only from the division of preexisting cells.

2. All living organisms are composed of cells.

3. The cell is the smallest unit of life and is the basic functional unit of living organisms.

4. Cells evolved from more primitive common progenitor cells. All progentior cells evolved from a common progenitor cell.

Answer 3

Prokaryotes are cells that do not have a cell nucleus or any other organelles. Bacteria fall in this category.

Eukaryotes are cells that do have a cell nucleus surrounded by a membrane. All other living organisms fall under this category.

The Cell Theory is:
1. All living organisms are composed of one or more cells
2. Cells are the most basic unit for function and structure of all organisms
3. All cells come from cells that already exist

My apologies to the person at Wikipedia who wrote that; it's stated far more succinctly than I could put it.

Answer 4

1. No, it's not the first thing I see when I awake. 2. No, it's not the last thing I see when I go to sleep. 3. Sometimes it calms me when I receive a call from a friend/family member. 4. Sometimes it aggravates me. 5. No, it doesn't entertain me. 6. Probably not, it does serve a purpose. Considering that pay phones aren't really around any more. You never know when you'll break down, get in an accident, running late for an important appointment, etc. So, they have become a necessity. Good poll ? Rikki take care Jilly

Answer 5

Prokaryotes are cells that havfe a nucleus, and eukaryotes are cells that don't.

The cell theory is a scientific theory that is one of the foundations of biology. The generally accepted parts of cell theory include:

* The cell is the fundamental unit of structure and function in living things.
* All organisms are made up of one or more cells.
* All cells come from pre-existing cells through cellular division.
* Cells carry genetic material passed to daughter cells during cellular division.
* All cells are essentially the same in chemical composition.
* Energy flow (metabolism and biochemistry) occurs within cells.

The three main parts of the cell theory are:

1. All living organisms are composed of one or more cells.
2. Cells are the most basic unit for function and structure of all organisms.
3. All cells come from cells that already exist.

Answer 6

Don't blaspheme.