*Essential Question: Identify the characteristics of life.
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Transcript of *Essential Question: Identify the characteristics of life.
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*Essential Question: Identify the characteristics of life.
Aim#3: What are the characteristics of life?
Textbook 1.3-Studying Life (p.17-23)
9/11/13
HW#3_______Read p.22-23-Fields of Biology: Read about a few fields in biology and write a short summary of the one that interested you the most. Explain why this field appealed to you.
HW#4 ________ Research 7 facts about pill bugs (isopods, pill bugs, sow bugs, rollie pollies)
Over the weekend- Collect pill bugs. Try to collect 10 of them. Place them in a small margarine or chinese food container with some tiny holes, place a moist towel in the container and a slice of potato and a tiny bit of soil. Label the container with your name and the period that your class meets for biology. Bring these in on Monday (if you do not have pill bugs on Monday, you will not be able to complete the pill bug lab).
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What you will need to do:1. Clean out a margarine/Chinese food container2. Poke a few holes into the cover of container3. Crumple and moisten a paper towel and place in the
container4. Slice a piece of potato or apple and put into container5. Carefully find pill bugs, place into container and cover6. Wash your hands and bring in to class on Monday to
start Lab!
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Isopods:Breath with gillsRestricted to areas with high humidity (moist)omnivores/scavengersharmlesslive 2 to 3 yearsseven pairs of legslike rotting vegetation4000 speciesmolt external skeletonfertilized eggs hatch from ventral pouchremove toxic metals from the soil!
Three Main Body Parts:
Head Thorax
Abdomen
Color: dark gray to white
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Pill Bugs
Sow Bugs
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We now know that Life CAN NOT be defined !!!
However… we CAN explain LIFE by describing characteristics of living things
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2)What is BIOLOGYBIOLOGY?
The Study of life!!
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2. What is
Biology?
a. Origins and history of life
b. Structures of living things
c. Interactions of living things
d. Function of living things
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3. What do biologists do?
a. Study the diversity of life
*What type of life forms do we study?
b. Research diseases*What diseases are in the news?
c. Develop technologies*How do we
improve technology?
d.Improve agriculture*How can we improve
agriculture?e. Preserve the environment
*How do we preserve nature?
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4. Characteristics of Life:
LIVING THINGS…a. Are made up of one or more cells
i. Unicellular vs. Multicellular
a.Display organizationi. For example:
- Organelles in a Paramecium- Specialized cells in multicellular organisms (ex. blood cells)
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4. Characteristics of Life:
c. Grow and Developi. Growth-
ii. Development-
d. Reproducei. Neutered dogs and cats?
ii. Species-
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4. Characteristics of Life:
e. Respond to stimulii. Stimulus-
ii. Response-
iii. Examples?
f. Require energyi. Metabolism:
i. Autotroph vs. Hetertroph:
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4. Characteristics of Life:
g. Maintain Homeostasisi. Homeostasis-
ii. For example: Changes in altitude
g. Have adaptations that can evolve over time (evolution)i. Adaptation:
i. Why are adaptations important?
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M metabolismR regulationS synthesisT transportR respirationA assimilationN nutritionG growthE excretionR reproduction
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M metabolismRSTRANGER
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METABOLISMMETABOLISM
- the total of ALL the life activities required to sustain life.
- it is ALL THE LIFE PROCESSES TOGETHER.
**includes activities that build substances as well as those that break down substances.
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MR regulationSTRANGER
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REGULATION- the CONTROL and COORDINATION
of various activities of an organism.- it involves responding to stimulistimuli.KEY WORDS:controlcoordinateregulateresponsestimulusdetect
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MRS synthesisTRANGER
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SYNTHESIS- chemical activities by which an
organism builds large, more complex molecules from smaller, less complex molecules.
Key Words:Form BuildMake CreateSynthesize Produce
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MRST transportRANGER
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TRANSPORT- the ABSORPTION of materials into the
organism AND CIRCULATION of materials throughout the organism.
Key words:
Circulate Absorb
Distribute Movement
Take in
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MRSTR respirationANGER
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RESPIRATION
- Breaking down food to generate ENERGY
KEY WORDS:
**MAKING ENERGY**
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MRSTRA assimilationNGER
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ASSIMILATION- When an organism incorporates new
material into the body or cell
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MRSTRAN nutritionGER
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Nutrition - activity by which an organism obtains
materials and energy from its environment and processes them for its own use.
Includes 3 processes:
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A. INGESTION =
B. DIGESTION =
C. EGESTION =
taking in food.
breaking down food.
removal of undigested or undigestible food.
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There are 2 TYPES OF NUTRITION:
a) AUTOTROPHIC NUTRITION =
- organism can MAKE ORGANIC COMPOUNDS FROM INORGANIC RAW MATERIALS
- or -
- organism can MAKE ITS OWN FOOD
ex: plants, some bacteria
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b) HETEROTROPHIC NUTRITION = - organism must OBTAIN FOOD from environment (can’t make its own) or- Organism MUST OBTAIN PRE-FORMED ORGANIC COMPOUNDS (FOOD) FROM THEIR ENVIRONMENTex: animals, fungi, bacteria
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MRSTRANG growthER
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GROWTH/DEVELOPMENT
- increase cell size and/or the number of cells in an organism.
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MRSTRANGE excretionR
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EXCRETION
- removal of the waste products PRODUCED BY THE ORGANISM! (metabolic wastes)
**Not the same as egestion!!!
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MRSTRANGER reproduction
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REPRODUCTION
- production of new individuals.
**this life process is not needed for survival of the individual, but it is needed for the survival of a species.
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LIFE PROCESSES/ACTIVITIESLIFE PROCESSES/ACTIVITIES• MM metabolismmetabolism• RR regulationregulation• SS synthesissynthesis• TT transporttransport• RR respirationrespiration• AA assimilationassimilation• NN nutritionnutrition• GG growthgrowth• EE excretionexcretion• RR reproductionreproduction
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What is HOMEOSTASISHOMEOSTASIS?
- the MAINTENANCE OF A STABLE INTERNAL ENVIRONMENT…. EVEN WHEN the external environment changes!
- Homeostasis depends on all the life functions working together in coordination to keep the organism stable.