Creating order from chaos

Question 1

In what ways can we classify animals?

Answer 1

Anatomy, physiology, behaviour, morphology, ecological niches, evolutionary pressures

Question 2

What is a monophyletic group?

Answer 2

Group of organisms that consist of all he descendants of a common ancestor

Question 3

What is a polyphyletic group?

Answer 3

Group of organisms that is given a formal taxonomic name (e.g. endothermic)

Question 4

What is a paraphyletic group?

Answer 4

Descended from a common evolutionary ancestor but not includng all the decendent groups. (e.g. ectotherms)

Question 5

What is a root in a cladogram?

Answer 5

Common ancestor

Question 6

What is an intemode in a cladogram?

Answer 6

Ancestral species

Question 7

What is a node in a cladogram?

Answer 7

Speciation event

Question 8

What is stabalising selection?

Answer 8

WHen animals have a more mean range of a single trait becomes more common overtime in a population

Question 9

What is disruptive selection?

Answer 9

Selective pressure is favourable to the two extremes (e.g. Darwins finches)

Question 10

What is adaptive radiation?

Answer 10

To radiate out from a central ancestor

Question 11

What is directional selection?

Answer 11

Evolution moves in a given direction