Science chapter 1
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who came up with binomial nomenclature?
How do the branches on a cladogram show relationships among organisms?
Each branch follows a new characteristic (lungs, fur, opposable thumbs)
Each characteristic is observed in all the species to its right.
Who was the first to classify organisms?
Why is maintaining homeostasis important to an organism?
- maintaining certain conditions ensures that cells can function
- if cells cannot function normally, then an organism might become sick or even die
a change in an organism's environment that causes a response
- internal: hunger, thirst
- external: temperature
What are the "characteristics of life"?
- grow and develop
- maintain certain internal conditions
- use energy
what is the smallest unit of life?
what happens in development?
multicellular organisms increase in size, cells become specialized
living things that are made of 2 or more cells
an organisms ability to maintain steady internal conditions
gives each organism a two-word scientific name
a group of organisms with similar traits
a group of similar species
a branched diagram that show the relationships among organisms
uses light and lenses to enlarge an image
one lens to magnify an object
use a magnetic field to focus a beam of electrons through an object of onto an objects surface
living things with one cell
things that have al the characteristics of life
living things are classified into different groups based on
physical or molecular similarities
why are scientific names important?
a common name may refer to many types of organisms
there may be several common names for one organism
- there is only one scientific name for one organism
- cuts down on confusion
how do you determine a microscopes magnification?
multiply the power of the ocular lens by the power of the objective lens
what is magnification compared to resolution?
magnification makes objects appear larger than it really is
resolution is how clearly a magnified object can be seen
how do you write a scientific name?
- first word is the genus name, capitalized (Haplopelma lividium)
- sometimes just the initial (H. lividium)
- second word is species, usually a description of appearance or behavior
- Domain->Kingdom Phyllum
- Class Order Family
- Genus Species
What is the currant classification system called?
What are the 3 domains?
- Archaea (r-key-uh)
- Eukarya (u-care-e-uh)
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