Reproductive Isolation in Evolution

What term is used to describe the phenomenon where hybrid embryos die?

Which factor prevents mating or fertilization in different species before the formation of zygote?

What is the term for the offspring of hybrids that are weak or infertile?

Which type of reproductive barrier prevents development of fertile adults?

What is the main function of structural isolation in plants?

Why do the male and female gametes of red & purple sea urchins fail to unite?

What happens when hybrid zygotes fail to develop or reach sexual maturity?

What is the primary effect of structural differences in genitalia or flowers in relation to copulation?

What is the definition of a species according to the biological species concept?

What do the barriers to gene flow in the biological species concept prevent?

Which type of reproductive barrier prevents mating or fertilization in the biological species concept?

What is an example of a prezygotic reproductive barrier?

Reproductive Barriers

Hybrid inviability is the term used to describe the phenomenon where hybrid embryos die.
Premating barriers, such as differences in behavior, habitat, or morphology, prevent mating or fertilization in different species before the formation of a zygote.

Hybrid Offspring

Hybrid sterility or hybrid inviability is the term for the offspring of hybrids that are weak or infertile.

Postzygotic Reproductive Barriers

Hybrid sterility or hybrid inviability prevents the development of fertile adults.

Plant Reproductive Barriers

Structural isolation in plants prevents cross-pollination, ensuring that different species do not mate.

Gamete Incompatibility

The male and female gametes of red and purple sea urchins fail to unite due to differences in their reproductive cells.

Failure of Hybrid Development

When hybrid zygotes fail to develop or reach sexual maturity, it is known as hybrid inviability.

Structural Isolation

The primary effect of structural differences in genitalia or flowers is to prevent copulation between different species.

Biological Species Concept

A species is defined as a group of interbreeding populations that are reproductively isolated from other groups.
Barriers to gene flow in the biological species concept prevent the exchange of genes between different species.

Prezygotic Reproductive Barriers

One type of reproductive barrier is the prezygotic barrier, which prevents mating or fertilization in the biological species concept.
An example of a prezygotic reproductive barrier is the difference in flowering times between two plant species, preventing them from cross-pollinating.

This quiz covers the concept of reproductive isolation in evolution, focusing on how structural differences in genitalia or flowers prevent copulation or pollen transfer between different species. It also discusses how plant species have flower structures adapted to specific pollinators, with examples provided.