BISC 101 QUESTIONS WITH COMPLETE
SOLUTIONS.
What is life?
"Life" is defined by a list of properties that differentiate living from non living things
Bio-ology
Biology comes from the Greek words "bio" meaning "life" and "logy" meaning "the study of."
7 characteristics of life
1. Contain nucleic acids, proteins, carbohydrates, and lipids:
2. composed of cells
3. Grow and reproduce
4. Use energy and raw materials
5. Respond to their environment
6. Maintain homeostasis
7. Evolve and have adaptive traits
Evolution
Evolution is the process by which modern organisms have descended from earlier and different
forms of life
Evolution explains the diversity of life on Earth
3 natural processes underlying evolution
,- Genetic variation among a population due to differences in DNA (group of same type of
organism in same area)
- Inheritance of those variations by offspring
- Natural selection of individuals whose survival and enhanced reproduction
Mutations
Mutations are the original source of differences in DNA
They occur when changes in genes are mistakenly copied or damaged by toxic chemicals/UV
rays
Mutation variations
Variations are due to the differences in genes, which make up DNA
Natural selection
Process by which organisms with certain inherited traits survive and reproduce better than others
in a particular environment
Adaptations
Structures, physiological processes, or behaviors that aid in survival/reproduction
Can't adapt? -> extinction (dinosaurs)
Levels of bio organization
Biosphere - Earth
, Ecosystem - community together w/ nonliving surroundings
Community - different speciies in same area
Species - all organisms similar enough to interbreed
Population - all members of species in same area
Multicellular Organism - indiviudal living thing composed of many cells
Organ system - two or more organs working together
Organ - structure made of varying tissues with specific bodily function(s)
Tissue - group of cells performing similar function
Cell - smallest unit of life
Molecule - combination of atoms
Atom - smallest particle of an element that retains properties of the element
Domains
Domain bacteria, domain archaea, domain eukarya
SOLUTIONS.
What is life?
"Life" is defined by a list of properties that differentiate living from non living things
Bio-ology
Biology comes from the Greek words "bio" meaning "life" and "logy" meaning "the study of."
7 characteristics of life
1. Contain nucleic acids, proteins, carbohydrates, and lipids:
2. composed of cells
3. Grow and reproduce
4. Use energy and raw materials
5. Respond to their environment
6. Maintain homeostasis
7. Evolve and have adaptive traits
Evolution
Evolution is the process by which modern organisms have descended from earlier and different
forms of life
Evolution explains the diversity of life on Earth
3 natural processes underlying evolution
,- Genetic variation among a population due to differences in DNA (group of same type of
organism in same area)
- Inheritance of those variations by offspring
- Natural selection of individuals whose survival and enhanced reproduction
Mutations
Mutations are the original source of differences in DNA
They occur when changes in genes are mistakenly copied or damaged by toxic chemicals/UV
rays
Mutation variations
Variations are due to the differences in genes, which make up DNA
Natural selection
Process by which organisms with certain inherited traits survive and reproduce better than others
in a particular environment
Adaptations
Structures, physiological processes, or behaviors that aid in survival/reproduction
Can't adapt? -> extinction (dinosaurs)
Levels of bio organization
Biosphere - Earth
, Ecosystem - community together w/ nonliving surroundings
Community - different speciies in same area
Species - all organisms similar enough to interbreed
Population - all members of species in same area
Multicellular Organism - indiviudal living thing composed of many cells
Organ system - two or more organs working together
Organ - structure made of varying tissues with specific bodily function(s)
Tissue - group of cells performing similar function
Cell - smallest unit of life
Molecule - combination of atoms
Atom - smallest particle of an element that retains properties of the element
Domains
Domain bacteria, domain archaea, domain eukarya
