Topic 4: Evolution - Reproductive Isolation

Vocabulary-style flashcards covering key terms related to species concepts and reproductive isolation mechanisms from the notes.

Species

-A group of organisms that are more or less alike

-Can produce fertile offspring

Reproductive isolation

Barriers that prevent interbreeding between species - helps to maintain distinct species.

Pre-zygotic barriers

Barriers that prevent mating or fertilization before a zygote is formed.

Post-zygotic barriers

Barriers that occur after fertilisation and prevent the maturation of the offspring.

Temporal isolation

Reproductive isolation due to different timing of mating/flowering.

Behavioural isolation

Reproductive isolation due to differences in courting behaviors, signals, or pheromones.

Mechanical isolation

Reproductive isolation caused by physical differences that prevent transfer of gametes.

Gamete isolation

Reproductive isolation where gametes may be transferred but fertilisation won’t occur.

Hybrid inviability

Hybrid zygotes begin to develop but fail to develop normally or survive.

Population

A group of organisms of the same species living in the same area.

Community

The sum of all populations in an area.

Ecosystem

The interaction between a community and the abiotic factors in an area.

Taxonomic Classifications

Kingdom–Phylum–Class–Order–Family–Genus–Species