Procedure: 1. Investigate each of the three components of cell theory to investigate from the corkboard in
the virtual lab:
All organisms are composed of cells.
Cells come from existing cells.
Cells are the basic unit of life.
2. For each section, record your observations below.
3. Complete your report and submit it forgrading.
o
o
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4.

cell.

    [Note: This topic focuses on the cell as a system itself (single-celled organism); as a part of larger systems (multicellular organism), and sometimes as part of a multicellular organism. But they are always as part of an ecosystem.]

1. The living conditions is dependent on the structure, function and interrelatedness of cell parts. A living cell is

composed of a small number of elements - - mainly carbon, hydrogen, nitrogen, oxygen, phosphorous and sulfur.

a. because of its small size and four available bonding electrons, carbon can join to other carbon atoms in chains and rings to form large and complex molecules (macromolecules; organic building blocks / amino

acids)

b. the essential functions of cells involve chemical reactions that involve water and carbohydrates, proteins,

lipids and nucleic acids

c. cell functions are regulated; complex interactions among the different kinds of molecules in the cell cause

distinct cycles of activities - - such as growth and division

d. most cells function within a narrow range of temperature and pH; at very low temperatures, reactions are

slow ; high temperatures and/or extremes of pH can irreversibly change the structure of most protein molecules; even small changes in pH can alter how molecules interact.

e. examples of homeostasis at the cellular level to maintain equilibrium are diffusion, osmosis, and active transport

f. cellular organelles include cytoskeleton, Golgi complex, and endoplasmic reticulum

g. every cell is covered by a membrane that controls what can enter and leave the cell

h. within the cell are specialized parts for the transport of materials, energy transformation, protein building,

wasted disposal, information feedback and movement

i. most cells in multicellular organisms perform some specific functions that others do not

2. Scientists believe that prokaryotic cells (in the form of bacteria) were the first life forms on earth

a. from about 4 billion years ago to about 2 billion years ago, only simple, single-celled microorganisms

(Prokaryotic cells) are found in the fossil record

b. ,

(Eukaryotic cells)

c. in all but quite primitive cells, a complex network of proteins provides organization and shape

Explanation:

MAKEIN THIS CLEAR IM IN 7th grade trying 2 help but i have all A's

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: