Module 1 Flashcards
Zoology
the study of animals
Heterotrophic organisms
gain energy by consuming organic materials from other organisms as they are unable to synthesise their own organic molecules from inorganic precursors
- feeding and digestion
Autotrophic organisms
synthesise organic molecules from inorganic materials to create their own energy
Phototrophs
autotrophic organisms that make organic molecules from light
Chemotrophs
autotrophic organisms that make organic molecules from chemicals
Blastula
multicellular organism
Archaea
includes mostly single cellular organisms
Eukaryota
includes combined single cellular and multicellular organisms
Bacteria
includes single cellular organisms
Animal
defined as a multicellular eukaryotic organism that its heterotrophic and contains a blastula stage during its development
Common ancestry
all animals are derived from a common ancestor
First animals
the first evidence of animals is between 640 and 540 million years ago
- research of rock samples from Oman in the Middle East suggest sponges, which are thought to be similar to the first type of animals, appeared around 640 million years ago
Cambrian Explosion
occurred 540 million years ago and caused a huge diversification of animal life
Common ancestry and animal diversification
the common ancestor of all animal life, and its genetics, physical shape and properties, is the foundation to which changes occur
- this foundation provides opportunities and limitations for what is able to change
- the success of change is in part determined by the abiotic and biotic factors of the environment that the organism inhabits
- the genetic makeup of each extant species determines what is possible to exist and change in subsequent generations
