Midterm #3 Content

Prototherians

Mammals that lay eggs

ex. duck-billed platypus and echidnas

Therians

viviparous=live birth

Marsupials

carry and feed offspring in ventral pouch

ex Kangaroo

Eutherians

The majority of animals

• Wait until baby is almost independent before leaving them on their own

Hominids

human lineage, bonobos, chimps

Hominins

Humans and their extinct ancestors

Extinct hominins give an opportunity to place derived traits along lineage leading to us

Neoteny

retention of juvenile traits - keeps features the organism had while young even after reaching sexual maturity 

ex-Axolotls

Bipedalism

Walking on two legs

Ecology

interactions of organisms with each other and with their enviroment

Biotic Environment

Abiotic Environment (non-living)

Living Organisms with Environment

Non-Living interactions with environment

Physiology

study of how organisms’ function