What fraction of your genes do you get from each parent?
1/2
100
VOCABULARY --
inherited behavior that helps animals survive
behavioral adaptation
100
VOCABULARY --
when an organism no longer has any members of its kind alive
extinct
100
VOCABULARY --
a poison that kills insects
pesticide
100
VOCABULARY --
body part that helps an organism survive
structural adaptation
200
What animal became extinct around 1680 when humans brought rats, pigs, and monkeys into its ecosystem?
The Dodo bird
200
VOCABULARY --
a change in an organism's genes that can be passed from parent to offspring
mutation
200
How did the bald eagle become endangered?
By the widespread use of pesticides (DDT)
200
How does spraying pesticides on crops affect the insect population?
The insect population will decrease
200
What is beak length or beak shape an example of?
structural adaptation
300
Why would introducing zebra mussels harm an ecosystem?
There are no natural predators.
300
VOCABULARY --
receiving of parents' genes
inherit
300
How do earthworms change their ecosystem?
1) their holes bring oxygen to plant roots
2) they improve the soil with digested materials they leave
behind
300
Why did the whooping crane come close to extinction?
1) loss of wetlands
2) hunting
300
If behaviors are not instinctive, what type of behaviors can they be?
learned
400
What effect can changes in ecosystems have?
They can: 1) help, 2) harm, or 3) have no effect
400
What type of behavioral adaptation affects how an animal behaves around other animals of the same species or different species?
instincts
400
If helpful chemicals are added to a lake that has been damaged by acid rain, what will happen to the lake's habitat?
The habitat will return more to its previous state
400
Why can hydrangeas be red, pink, or blue?
Because of the acidity of the soil
400
How do American flamingos get their color?
BONUS: What type of trait is this?
Flamingos are born white. They get pink feathers from eating shrimp.
BONUS: acquired
500
Why can't some species move to new ecosystems?
Because they: 1) can't move, 2) have nowhere to move to
500
What are 4 things that ecosystems are always being changed by?
1) organisms 2) water 3) wind 4) other parts of the
environment
500
What structural adaptations help the frog survive?
Suction cups -- help escape predators
Powerful legs -- help it move quickly
Color -- help it hide
500
How would a wetland be changed if people filled it in so they could build houses?
1) it would destroy the natural environment
2) it would affect all the plants & animals that lived there
3) organisms would have to move, adapt, or become extinct
500
How have some bacteria become resistant to antibiotics?
Some have adapted to living with antibiotics and passed their genes on to their offspring