Ch. 23

Question 1

Group of individuals sharing simlar characteristics

Assumes there is a sharp discontinuity between species

Each species is defined by a particular type

Answer 1

Typological

Question 2

A Group of organism that can interbreed and produce fertile offspring

Most precise definition for a species

Answer 2

Biological species

Question 3

Which species concept has the following problems:

Can’t be used for asexual organisms
Difficult to test
Some groups of organisms that can produce fertile offspring don’t do so normally
Different typological species may be a single biological species
It is common for evolution to result in two populations looking different

Answer 3

Biological species concept

Question 4

What does the Biological species concept still retain in terms of reproducing

Answer 4

Fertile offspring

Question 5

Which barrier prevents successful interbreeding because:
Species occur in the same region but occupy different habitats
Species breed at different times of the year
Species have different mating behaviors

Answer 5

Behavioural barrier

Question 6

Which barrier prevents successful interbreeding because of:
Structural differences between organism prevents mating

Answer 6

Mechanical isolation

Question 7

Which barrier prevents successful interbreeding because of:
Gametes are prevented from uniting due to incompatible cell surfaces

Answer 7

Gamete isolation

Question 8

Describe the first process of species formation discussed in class

Answer 8

Formation of species through geographic isolation of populations