What are two adaptations that help animals stay warm in extremely cold climates?
blubber and thick fur
100
Why does a beluga whale have blubber instead of thick fur?
to swim more easily
100
What adaptation does an alligator have to help it find prey while submerged in water?
the position of its eyes (on the top of its head)
100
What adaptation might help a bird find a mate?
bright feathers
200
An extinct animal or plant species is one that _________________________.
no longer exists
200
A species that is in danger of becoming extinct is said to be what?
endangered
200
In the United States, endangered animals and plants are protected by the ______________ ________________ Act.
Endangered Species
200
What about a plant attracts pollinators?
bright petals and/or fragrant flowers
300
One year, the population of snowshoe hares in an Alaskan park increased greatly. Over the next few years, what will probably happen to the population of the lynx, the hare's major predator?
It will increase because there are more hares to eat.
300
300 Dall sheep live on a mountain. The winter is harsh and snowy. What will probably happen to the sheep population during the winter?
It will probably decrease because of the harsh weather.
300
The amount of suitable habitat, the number of predators, and the amount of human activity all limit the size of a particular what?
population
300
Better food for deer, a lack of natural predators, and more fawns being born are all possible reasons that the deer population is ________________ in the U.S.
increasing
400
Limiting people's access to the beach is the best way to increase the population of endangered beach animals that live there.
True or False
True
400
A pufferfish swells up with water when it feels threatened. This is an example of a ________________.
behavior
400
Why do some species of birds migrate?
to avoid cold and find food
400
A rabbit's heartbeat quickens, it's muscles tense, and it's breathing becomes shallow. What is the most probable reason?
it sees a predator
500
The population of a species of animal in an area includes all members, all females, all males, or all juveniles?
all members
500
A family of birds lives on a tree branch. A family of worms lives in the soil under the tree. The birds and the worms are part of the same _________________.
ecosystem
500
What basic need do worms fill for birds?
food
500
How do ANIMALS get energy from the sun?
by eating plants that make food from the sun's energy