Earth Forms
What is Extinction?
Species completely dies out and no members survive
What is Artificial selection?
Humans can breed plants and animals to have useful traits
A group of organs which work together to perform a specific function is what?
The body system
What are animals?
a living thing that can move and eat and react to the world through its senses, esp. of sight and hearing
What is the respiratory system?
A high concentration of CO2 causes breathing rate to increase, this removes CO2
What makes a good fossil?
Quick burial, Hard parts like bones, teeth, traces (Foot prints or burrows)
what is population?
Number of a specific species in a given area
We have 206 ___?
Bones
All cnidarians have this characteristic
Stinging cells
what are organs in the Integument system
Skin, Hair, and Nails
What is absolute dating?
Radiometric materials to find a date for the rock
What is a gene pool?
all genes of all the members of a population
A muscle that pumps blood through blood vessels is what?
The Heart
These animals have jointed legs and specialized parts.
arthropods
What produces the pigment melanin?
Melanocytes
Molecular Clock
What is mutation?
vary the alleles in a population
What is a Pancreas?
Secretes digestive enzymes and regulates blood sugar levels.
All molecules have what characteristic?
Soft Bodies
___ releases enzymes to enable partial digestion of food
Stomach
What are fossils?
Preserved remains or traces of organisms that lived in the past.
Random changes that happen in a small population are?
Genetic Drift
What do Testes produce?
Sperm and hormones
An exoskeleton is like wearing what?
Armor
what is the tounge?
muscular organ used for chewing, swallowing, speech, and tasting foods.