first test of year 7 Flashcards
organisms
things that have all the characteristics of life
cell
smallest unit of life
unicellular
living things that are made of only one cell
multicellular
living things that are made up of two or more cells
homeostasis
an organism’s ability to maintain steady internal conditions when outside conditions change
binomial nomenclature
gives each organism a two word specific name
species
a group of organisms that have similar traits and are able to produce fertile offspring
genus
group of similar species
dichotomous key
a series of descriptions arranged in pairs that leads you to the identification of an unknown organism
cladogram
a branched diagram that shows relationships among organisms, including common ancestors
light microscope
uses light and lenses to enlarge an image of an object
compound microscope
a light microscope that uses more than one lens to magnify an object
electron microscope
uses a magnetic field to focus a beam of electrons through an object or onto an object’s surface
What characteristics do all living things share?
All living things have cells, can grow and develop, reproduce, respond to stimuli, maintain homeostasis, organization, and use energy.
cells- smallest unit of life and unicellular/multicellular
grow and develop- increase in size and as cell grows bigger
reproduce- organism makes another asexual- one parent sexual- two
respond to stimuli- reacting to changes- internal such as hungry- external such as getting tan
maintain homeostasis- able to maintain steady internal conditions when something changes
use energy- everything you do use energy
organization- all livings have structures that have specific functions
Why are things classified?
We classify things because it makes it easier to study different organisms. It also helps us understand and classify new organisms.