One cells organisms
cellulose
multicellular
unicellular
Why is there debate by scientists over whether virus' are alive or not alive ?
because a vaccine will kill them easily
because they are hard to kill
because there are very few of them
because they can only live if they are on a host
The breaking down of rock at the earth's surface
constructive
weathering
erosion
deposition
Invertebrates do not have a
stomach
backbone
heart
backbone
Which characteristics help scientists classify an organism as an animal?
It is made up of many cells and gets food from the sun
It is made up of a single cell and makes its own food
It is made up of may cells and makes its own food
It is made up of many cells and feeds on other living things
Has a backbone, four legs and long tail, scales on its body
amphibian
reptile
mammal
bird
