Weekly Wonders

• I have put the dates of when I expect you to learn the Weekly Wonders. If there is a test scheduled for the week you are still expected to learn the Weekly Wonder. Matter of fact, the Weekly Wonder may be on that test. For example, a test on September 13th, could have questions based on the Weekly Wonder for September 10-14.

August 26-30

• Flagella-long whip-like projections responsible for the movement of some animal, bacterium and protist cells

• Cell Membrane-aka plasma membrane- structure that surrounds the cell and regulates what enters and exits the cell

September 9-13

September 16-20Scientific Method

1. make an observation• 2. research the topic• 3. form a hypothesis• 4. set up a controlled experiment• 5. record and analyze the results• 6. draw a conclusion

September 23-27Prokaryotes Eukaryotes

Oldest and least developed or simple More recent (still old) and more developed or complex

DNA floats in cytoplasm DNA condensed into chromosomes in nucleus

Single-celled organisms Single-celled or most likely multicellular

No membrane-bound organelles Membrane-bound organelles (so can specialize)

September 30-October 4Characteristics of living things

1. made of one or more cells• 2. grows and develops• 3. reproduces• 4. responds to stimuli (reacts)• 5. requires energy• 6. maintains homeostasis• 7. adapts over time (evolves)• 8. displays organization

October 7-11DNA RNA

A-T; T-A A-U; U-A

G-C; C-G G-C; C-G

October 21-25Cell Theory

1. All living things are composed of one or more cells

2. Cells are the basic unit of structure and function in an organism (basic unit of life)

3. Cells come only from the reproduction of other cells

October 28-November 1

Symbiosis-relationship that has developed between two or more species that are in

direct contact

Type 1st Species 2nd Species

Commensalism Benefits Unaffected

Mutualism Benefits Benefits

Parasitism Benefits Harmed (not killed)

November 11-15

• Golgi Apparatus-modifies, collects, packages and distributes molecules (proteins) within or outside the cell

• Cilia-short hair-like projections responsible for the movement of animal cells or protists

• Cell Wall-rigid layer that surrounds cell membrane, gives protection, support and shape to the cell, present in plants, algae, fungi and most bacteria

November 18-22

December 2-6

• Ribosomes- sites of protein synthesis,, some are on ER and some float in the cytoplasm

• Endoplasmic Reticulum-ER-complex, extensive network that transports materials throughout the inside of the cell

December 9-13Mitosis Meiosis

Divides once, results in two cells Divides twice, results in four cells

Occurs in somatic cells (body cells) Occurs in gametes (sperm or ova)

Takes place throughout the organisms lifetime

Takes place only at certain times in the life cycle

Forty six chromosomes in each cell Twenty three chromosomes in each cell

Involved in asexual reproduction Involved in sexual reproduction

Each cell is genetically identical Each cell is genetically unique

December 16-20

• Nucleus- contains the chromosomes which are composed of DNA, functions in the genetic control of the cell

• Mitochondria-sites of cellular respiration, the process that supplies the cell with energy (ATP)

January 6-10

January 27-31

• Lysosome-organelle that contains enzymes that digests other organelles and material

• Vacuole-organelle that stores salts, carbohydrates, and proteins, much bigger in plant cells than in animal cells

• Chloroplast-organelle that converts sunlight into organic compounds, found primarily in plants

FEBRUARY 3-7

Organic CompoundsMacromolecule Used for: Made of:

Protein Enzymes, muscles, hair, skin

Amino Acids

Lipids Stores energy, hormones XXX

Carbohydrates Energy Monosaccharides

Nucleic Acids DNA, RNA nucleotides

February 10-14

• Diffusion-movement from molecules from an area of high concentration to an area of low concentration

• Facilitated Diffusion- transporting substances across a cell membrane due to a concentration gradient using carrier proteins (diffusion with doors)

February 24-28

March 17-21

• Autotroph-uses sunlight or chemical bond energy to make organic compounds

• Heterotroph-must consume food in order to have organic compounds

March 24-28

March 31- April 4

• Genotype-the genetic make-up of an organism• Phenotype-the appearance of an organism

April 7-11

April 21-25

April 28- May 2