Class of animals that are characterized by hair and mammary glands.
The gland that produces milk to nourish young mammals.
Animals that are able to generate their own body heat internally.
A layer of fat located under the skin that, along with hair, helps keep mammals warm.
Chisel-like teeth seen in mammals that are used for cutting, gnawing, and grooming.
Pointed teetch found in mammals used for piercing, gripping and tearing.
Teeth used for crushing and grinding food in mammals.
Smaller molar-like teetch found between the canines and molars in mammals.
An extra stomach chamber found in cows and their relatives that stores and breaks down plant material.
Large, flat muscle at the bottom of the chest cavity that helps with breathing.
Organ that helps control the composition of body fluids in mammals.
The part of a mammalís brain that controls complex behaviors like thinking and learning.
The outer layer of the cerebrum that is larger in mammals than in other types of vertebrates.
Part of the mammalís brain that controls muscle coordination.
Part of the mammalís brain that controls unconscious activities, like breathing and heart rate.
Mammals that lay eggs, like platypuses and anteaters.
Mammals that bear live young at a very early stage of development and allow them to grow in an external pouch like kangaroos, koalas, and wombats.
The pouch where young marsupials grow.
An internal structure formed when the embryoís tissues join the tissues from within the motherís body that allows for the exchange of nutrients, oxygen, carbon dioxide, and wastes between the embryo and mother.
Hoofed mammals with an even number of toes on each foot, like cows, sheep, and goats.
Mammals that stalk and kill their prey with sharp teeth and claws, like bears, dogs, and foxes.
Mammals that live and breed in the ocean, like mammals and dolphins.
Winged mammals like bats.
Mammals with long, narrow snouts and sharp claws used for eating insects like shrews, hedgehogs, and moles.
Small mammals that have two pairs of incisors and hind legs adapted for leaping like rabbits and hares.
Hoofed mammals with an odd number of toes on each foot, like horses, tapirs and rhinos
Mammals with highly developed brains and complex behaviors like apes, monkeys, and humans
Mammals with trunks like elephants.
Mammals with one pair of curved incisors like rats and mice.
Aquatic mammals that are large and slow-moving, like manatees and dugongs
Order of mammals that have simple teeth or no teeth at all like sloths, anteaters, and armadillos
When species that are unrelated develop similar traits.
The ability to merge visual images from both eyes, thereby providing depth perception and a three-dimensional view of the world.
The simplest group of primates that are usually small, nocturnal and have a dog-like snout like lemurs and tarsiers
Human like primates.
New world monkeys
Monkeys found in Central and South America that have prehensile tails like squirrel monkeys and spider monkeys.
Old world monkeys
Monkeys found in Asia and Africa that lack a prehensile tail like baboons and macaques.
Primates that do not have tails like orangutans, gorillas, chimpanzees, and humans.
Humanís closest relative among great apes, sharing 98% of their DNA.
The taxonomic family to which humans belong.
The ability to walk on two feet that allowed early hominids to have free hands to use tools.
A thumb that enables grasping objects and tools.
Hominid that lived 4-1 million years ago that were small, bipedal, and spent at least some time in trees.
Hominid species that lived 2.7-1 million years ago that were larger and more muscular than their predecessors.
Hominid species that lived 4-1 million years ago that had some characteristics of chimpanzees but a smaller brain.
Hominid species that lived 7-6 million years ago that looked like chimpanzees but had a human-like face.
The genus modern humans belong to that originated in Africa.
Species that lived 2.5-1.5 million years ago that were the first homo species to be found with tools.
Species that lived 2-1.2 million years ago that were larger and had a more complex brain than homo habilis.
Species that lived 1.8-0.5 million years ago that may have been the first homo species to leave Africa.
Species that lived from 200,000-30,000 years ago alongside homo sapiens in Europe and the Middle East.
Species that modern humans belong to, oldest fossils are about 200,000 years old.
Number of species in class Mammalia
How long ago the first true mammals appeared in the fossil recrod
Australopithecus, Homo habilis, Homo ergaster, Homo erectus, Homo neanderthalensis, Homo sapiens
A long tail that can grasp small objects and act as a fifth appendage
5 Traits all mammals share
Hair, mammary glands, breathe air, four-chambered heart, endothermic
Three groups of mammals
Monotremes- lay eggs (platypus)
Marsupials- house young in pouch (kangaroo)
Placentals- nourish young internally (humans)
When two species that are unrelated acquire similar traits
4 Features all primates share
binocular vision, well-developed cerebrum, long fingers/toes, arms that can rotate around their shoulder joints
Features that allowed mammals to survive the extinction of dinosaurs
Hair, endothermic, wide variety of diets, well-developed brains for problem solving