Vocabulary
Being able to move from place to place to collect food.
Motile
Humans and most animals are born with ___ symmetry.
Bilateral
Which elephant species is the largest.
African Bush Elephant
How many species of insectivores are recognized today?
500
These animals have forked tails and weigh up to 900 lbs; one kind lives in the Red Sea and others in the Indian Ocean.
Dugongs
Animals that chew the cud.
Ruminants
Warm-blooded animals have a __ chambered heart.
4
The largest living marsupial.
Kangaroo
Hedgehogs, moles, and __ are the most common insectivores.
Shrews
These are made of ivory and are actually enlarged incisor teeth.
Tusks
Animals with four appendages or limbs attached by bones to the body at the hips or shoulders.
Tetrapods
Which cells are responsible for the hair of mammals?
Epithelial Cells
What is the scientific term for a marsupial's pouch?
Marsupium
These insectivores live almost exclusively underground, with their favorite food being earthworms.
Moles
Hoofed mammals are called ___.
Ungulates
Because their young is born alive, placental mammals are considered ___.
Viviparous
True or false: the lungs of mammals are larger in relation to body size than those of reptiles and amphibians.
True
How many species of elephants are known by fossils only?
300
These insectivores are mouse-like animals with long, pointed noses.
Shrews
Dugongs and manatees are often referred to as ___.
Sea Cows
This term means to "maintain the same temperature."
Homeothermic
Fluid that absorbs the shock of its mother running or being bumped into by an object.
Amniotic Fluid
How many species of marsupials are recognized today?
270
From October to April, these animals have a greatly lowered body activity and rely on stored fat supplies for energy.
Hedgehogs
What is the only land-dwelling mammal that is not instinctively afraid of humans?
Polar Bear