Introduction to Zoology Flashcards

1
Q

What are the 3 domains?

A

Eukarya, Bacteria, Archaea

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2
Q

What are features of archaea?

A

Single celled
No nucleus
Most are extremophiles

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3
Q

What are the features of bacteria?

A

Single celled
No nucleus
Specialised cell membranes
Unique mRNA

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4
Q

What are the features of eukarya?

A

Many are multi-cellular
Have a membrane bound nucleus

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5
Q

Name some features of animals

A

Eukaryotes
Multicellular
Heterotrophic
Muscle and nerve tissue unique to animals - not all have these
Lack cell walls - held by collagen (which forms the ECM)
Unique cell junctions

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6
Q

What are the unique cell junctions?

A

Tight Junctions = continuous belt that connects two cells together

Desmosomes = anchoring junction that connects two cells at ONE point

Gap Junctions = communicating junctions that allow small molecules to pass between cells

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7
Q

What was the likely common ancestor of animals?

A

A choanoflagellate protozoan

Single flagella surrounded by a collar of microvilli used for filter feeding

Structure of single flagella similar to that of cilia of primitive animals

Similar mitochondrial structure

Similar DNA

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8
Q

Name the 15 main phyla of animals

A
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9
Q

Order of the taxonomic nomenclature

A

Domain
Kingdom
Phylum
Class
Order
Family
Genus
Species

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