User talk:Madevilsniper

Here's your homework. Watch yourself, next time it might be deleted without someone Copy and pasting it. Cantras 05:32, 7 December 2006 (UTC)

Biology Homework Pg:122, 124, 127, 132. 12/6/06 	Period 3

Pg: 122 (# 1-5) 1)The main ideas of cell theory are that; Cells are units of structure and function in -all organisms; All cells come from pre-existing cells;Cells are basic unit of life.

2)The stains cause more clear identity to the organelles that the scientist was looking for.

3)Using a light microscope may require stains, which may cause killed or distorted cells, Using a Phase contrast microscope is better for observing cell division, Using a electron microscope, uses high magnification, and uses a electron beam.

4)A Prokaryote cell don't have membranes that enclose the dna, The Eukaryotes cell have a membrane that encloses the dna.

5)The word “cell” has changed over time by not that much, but is added that all techniques used to observe cells have updated.

Pg: 124 (# 1-3) 1)The Cell membrane encloses the cell's content, it controls the passage of materials into and out of the cell, and is made of two thin layers of lipid molecules.

2)The nuclear membrane surrounds and protects the nucleus, the mitochondria is the power house of the cell, and the centrioles helps cell divisions.

3)The unique plant cell organelles that help plants are the chloroplasts, which contain chlorophyll.

Pg: 127 (#1-5) 1)Activities that occur in metabolism is that important molecules are processed, energy is then transferred into ATP, and waste materials are released.

2)Cells constantly take in and get rid of substances, because thats how they get their energy.

3)Concentration Gradient is where there is a high concentration of diffusion, and so then diffusion, helps the distributing of materials within cells.

4)The cell membrane helps protects the cell by transporting certain, materials that is only needed, and so the cell membrane also blocks intruders and protects, like a computer firewall.

5)passive transportation, uses no energy, and Active transport uses up energy, and can go against the concentration gradient.

Pg: 132 (#1-6) 1)Diffusion may limit the size of cell because when a cell is equal, then it won't any more molecules, so the cell won't be “fat”.

2)In the interphase, the DNA organizes itself, then in prophase, the chromosomes condenses, spindle forms and the fibers attach itself onto chromosomes, then in metaphase, the chromosomes, move to the center of cell, In anaphase, the chromosomes split up to go toward the opposites poles, then in telephase, a cell plate forms, and now two cells!

3)Replications means a exact clone of something, a replicate.

4)The role of a spindle apparatus in mitosis is that it will replicate itself to form two new cells.

5)The process of mitosis is that the DNA go organize, then it lines up in the center, after it pull it self to the opposite poles, then the cell plate forms, and viola, two cells!

6)The biological importance of cell division is that cells can form together to do different jobs, and form a organism like animals or plants.