Scientific Method

P (problem)

H (form a hypothesis)

E (experiment) - must have a control group (is not tested) and experimental group (gets tested)

D (collect data)

A (analyze)

R (repeat)

Life Functions -necessary for all living things

Metabolism: chemical reactions necessary to sustain life

Respiration: converts energy (ATP) in food to a more usable form (mitochondria) plant and animal

Photosynthesis: autotrophs make their own food (chloroplast) only plant

Reproduction: creating offspring, necessary for survival of species, but not individual

Homeostasis: maintain internal stability

Enzymes                                                                                                                     

Speed up chemical reactions- affect the rate of reactions

Function at specific:  temperature and PH

Model: Lock and key

• Carry out life functions

Ribosomes

• Make (synthesize) protein

Nucleus

• Control center of cell

• Contains hereditary information (chromosomes containing genes)

Vacuole

• Stores water in cell

Mitochondria

• Site of aerobic cellular respiration, cells that require more energy have more mitochondria

Plasma Membrane

• Phospholipid bilayer

• Double layer of lipids, protein inserted

• Selectively Permeable: Allows waste in and out of cell (oxygen in carbon dioxide out, water in waste out)

Only Animal Cell

• Centriole

Only Plant Cell

• Chloroplast

• Central vacuole

• Cell wall

Nutrition Organic molecules contain C, H, O or C, H, O, N in different combinations