Unit 1
What is mutation?
Permanent changes in a cells DNA, can be good or bad.
What taxonomy?
The study of how we identify,name and calassify species.
Have a cell wall and chloroplast and make their own food.
The immune system defends the body against...??
disease
what is a biotic factor?
Living things in an ecosystem
What are fossils on upper layers?
The Newest
Why do scientist class organisms?
To organize them into easily indentifiable groups.
Define animals cells.
have a cell membrane, not a cell wall. Animal cells can move
Define the reproductive system.
Allows the species to reproduce.
What is a abiotic factor?
non-living factors including tempature, water,sunlight,wind,rocks, and soil
Define the term Fitness.
The ability to survive and reproduce.
Who is considered the father of taxonomy?
Carolus Linnaeus
How are animal and plant cells alike?
both have a nucleus and organelles.
define the nervous system
detects sensations and controls functions
An organism is??
any living thing
Define convergent evolution.
The independent evolution of similar features in different lineages.
What is Archaea?
small,single celled, prokaryotic,live in extreme environments.
What is a vacuoles job?
Store food and water in the cell.
What is the digestive systems job
to break down food and absorb nutrients
define a producer and an example
organisms that can make their own food
grass
Genetic variation is?
Necessary for natural selection.
What evidence do scientist use to make a cladogram?
common characteristics between organisms.
Define the animal cell.
Does not have a chloroplast or cell wall. round in shape.
Levels of organization?
cells,tissues,organs,organ system, and organims
What is on organism in a food chain that represents a feeding step called?
trophic level.