Bio 123: PP1 Material Flashcards
Define Life
Life is unique because they are organisms that have functions such as metabolism, growth, reproduction, and response to stimuli or adaptation to the environment originating from within the organism.
How many chromosomes does bacteria have?
1
What is DNA made out of?
1- Sugar deoxyribose
2- nitrogenous base
3- Phosphate group
What is homeostasis?
The ability of an organism to maintain relatively constant internal conditions that are different from their environment.
What is the hierarchy of living organisms?
1) Atom 2) Molecule 3) Cells 4) Tissue 5) Organs 6) Organ Systems 7) Organisms 8) Population 9) Community 10) Ecosystem 11) Biosphere
What are the 6 unifying characteristics of living organisms?
1)Metabolism-can make and produce their own energy
2)Unicellular or Multicellular- (The Cell Theory)
3)Homeostasis
4)Respond/adapt to stimuli and changes in their environment
5)Can reproduce and grow
6) All organisms contain DNA & RNA
What are prokaryotic cells?
Cells that lack a nucleus and lack many membrane bound organelles.
What are Eukaryotic cells?
Cells that have a nucleus and membrane bound organelles.
What are heterotrophs?
All consumers; can be organisms that eat off dead/decomposing material (decaying).
What are autotrophs?
All producers; can produce their own energy through 2 ways
1- through photosynthesis
2- through chemosynthesis
How many chromosomes do humans have?
46
Define Biodiversity
The variety in living things and the ecological complexes in which they occur.
How is Biodiversity measured?
-It is measured through the variety of species
-Ecosystem functions
-Interactions (Pred/prey, mutualisms, parasite/host, competition)
-Habitat
Define extant
Species that are alive today
What are the three domains of life?
1) Bacteria
2) Archaea
3) Eukarya
