Chapter 1 The Study Of Life Flashcards
The study of life
What is a tissue?
a group of similar cells that perform a specific function
What is a cell?
the smallest unit of life
What is an organ system?
Several organs that work together
What is reproduction?
The process of making offspring
What are genes?
DNA that are passed to offspring
How do organisms respond to external stimuli?
By moving toward or away from the stimuli
What is an organisms behavior?
Avoiding injury, acquiring food, mating
What are key elements in Homeostasis?
organisms maintain a relatively constant internal environment.
How long has life been on earth?
4 billion yrs
A feature in Adaptations
adapt to the world to create more offspring
What is evolution?
How specifices change over the years
What is taxonomy?
Identifying and grouping organisms
What is systematics?
Study of evolutionary relationships among organisms
What are the classifications of an organism?
Taxonomy,
species,
genus,
family,
order,
class,
phylum,
kingdom,
supergroup,
or domain
What is a domain?
Classification of organisms based on biochemical and genetic evidence
Where is prokaryotic cells found in?
Archaea and Bacteria
What is a prokaryotic cell?
A cell that lacks a nucleus
What is eukaryotic cells?
cells with a nucleus
Where do bacteria live?
water, soil, atmosphere and human skin
Where do
Archaea live?
Extreme temperatures
What are some fungi?
Mushrooms, molds
3 kingdoms that Eukaryotes evolved from protists?
Plants, Fungi, Animals
What are some details about Protists eating habits?
some are photosynthetic and some must acquire food. Algae, protozoans, and water molds.
What is protists
single celled organisms.
