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What are the 5 characteristics that living things share?
- 1 or more organized cells
- Environmental interaction
- Contain heritable genetic info
- Are genetically related & have evolved
- Can regulate internal environ
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Cells are the ___ ___ of ___.
Basic units of life
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What is an organ system?
Grp of organs that function together
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What does a population consist of?
Organisms of the same species living together
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What does a community consist of?
Several unrelated populations living together
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Define ecosystem.
A community & its physical environment
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What is the biosphere?
Part of the earth where biological activity occurs
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The ____ is the ultimate source of energy available to life on earth.
Sun
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Metabolism is . . . .
- A process where organism’s transform & use energy & molecules
- Convert molecules fr environment into new biological molecules
- Extract energy fr environment & use it to do biological work
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All organisms need ____ to provide the energy they need to live.
Food
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DNA is known as the what?
Blueprint of life
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DNA carries a genetic code or genome which does what?
Directs production of essential molecules that perform specific functions of life
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The units of genetic code is stored in units called ____.
Genes
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How are genes passed on fr generation to generation?
Through reproduction - sexual or asexual
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A theory is defined as . . . .
A general set of principles supported by evidence that explains some aspect of nature
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Can a theory be modified?
If compelling evidence arises a theory may be modified
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A theory is more like a ___ or ___ ___.
Principle or natural law
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T or F - A theory is extensively & reproducibly tested
True
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What are 2 ideas of "descent with modification?"
- 1. Organisms alive today are descended fr those alive long ago
- 2. All organisms have common characteristics b/c they are related to one another
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What is the primary principle of "survival of the fittest?"
Organisms w/any trait that increases probably that its owner will survive & produce more offspring
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Define Homeostasis.
An organisms ability to maintain a steady internal state in spite of external changes
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A negative feedback loop promotes ____.
Homeostasis
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Taxonomy is the . . . .
Science of classifying & naming organisms
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___ ___ is a 2 named sys used t classify living organisms
Binomial Nomenclature
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A genus is an . . .
Organism with a common ancestor comprised of similar species
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A species is a what?
Grp of organisms capable of interbreeding & producing fertile offspring
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Finish the following Domain, Kingdom, Phylum, ___, ___, ___, ___ & ___.
Class, Order, Family Genus & Species
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What are the 3 domains of living things?
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Describe Archaea.
- Single celled prokaryotic organisms found in extreme habitats
- No membrane bound nucleus or organelles
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Describe Bacteria.
- Single celled prokaryotic organisms that live everywhere
- No membrane bound nucleus or organelles
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Give 3 characteristics of Eukarya.
- Unicellular or Multicellular
- Have nucleus & membrane bound organelles
- More complex than prokaryotes
- Divided into 4 kingdoms-protista, fungi, plantae, animalia
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What are the 4 main Kingdoms of Eukarya?
- Protista
- Fungi
- Plantae
- Animalia
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Define Symbiosis.
2 organisms working together to help each other out
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Give some characteristics of heterotrophs.
- Obtain food fr environment
- Consumers
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Give some characteristics of autotrophs.
- Create energy fr inorganic sources
- Producers
- Utilize photosynthesis
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Explain decomposers.
- Heterotrophs
- Break down dead or decaying organisms
- Carries out natural process of decomposition
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Prokaryotic cells have what characteristics
- Lacks membrane enclosed nucleus & organelles
- Called prokaryotes (bacteria & archaea)
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Give 4 characteristics of protists.
- Eukaryotic
- Single celled (amoeba, paramecium)
- Means "1st animals"
- Often diseases - amebic dysentery, Malaria
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Give 5 characteristics of funji.
- Eukaryotic
- Most multicellular
- Some unicellular (yeasts)
- Absorptive heterotrophs (decomposers)
- Can cause disease - tineas
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Give 4 characteristics of plantae.
- Eukaryotic
- Multicellular
- Autotrophs - photosynthesis
- Often used in medicine (ASA)
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Give 4 facts about animalia.
- Eukaryotic
- Includes worms, insects, mammals, fish etc
- Heterotrophs - consumers
- Divided into vertibrates & invertibrates
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