Speciation: The Origin of Species
An 11th-grade biology worksheet covering the mechanisms, types, and factors influencing speciation.
Includes
Standards
Topics
Speciation: The Origin of Species
Name:
Date:
Score:
Read each question carefully and provide your best answer. This worksheet assesses your understanding of speciation, its mechanisms, and influencing factors.
1. Which of the following is NOT considered a prezygotic reproductive barrier?
Habitat isolation
Temporal isolation
Reduced hybrid fertility
Behavioral isolation
2. Allopatric speciation typically involves which of the following?
Polyploidy in plants
Geographic isolation
Sexual selection within a population
Hybrid zones
3. The process by which one species splits into two or more species is called .
4. Sympatric speciation occurs when populations become reproductively isolated despite living in the same .
5. Briefly explain the concept of a reproductive barrier and provide two examples.
6. Differentiate between allopatric and sympatric speciation.
7. Genetic drift can contribute to speciation, especially in small populations.
True
False
8. Hybrid breakdown occurs when first-generation hybrids are fertile, but subsequent generations are sterile or inviable.
True
False
Match the term on the left with its definition on the right.
9. Punctuated equilibrium
a. The formation of new species without geographic isolation
10. Sympatric speciation
b. Periods of rapid speciation followed by long periods of stasis
11. Adaptive radiation
c. The evolution of many diverse species from a common ancestor
12. Observe the diagram below, which illustrates a hypothetical speciation event.
Based on the visual information, what type of speciation is most likely depicted and why?