Question

question 7 (mandatory) (2 points)
true or false? if a geographic barrier such as the great wall in china arises that interrupts gene flow between two populations, then allopatric speciation has occurred.
true
false
question 8 (mandatory) (2 points)
the disappearance of dinosaurs is an example of ____________
sympatric speciation
hybrid inviability
macroevolution
adaptive release
question 9 (mandatory) (2 points)

Explanation:

Question 7

Allopatric speciation occurs when a geographic barrier (like a mountain range, river, or in this case, a wall) separates a population, interrupting gene flow. Over time, the separated populations evolve independently. So, if a geographic barrier interrupts gene flow between two populations, allopatric speciation has occurred.

• Sympatric speciation is speciation without a geographic barrier.
• Hybrid inviability is a post - zygotic reproductive barrier where hybrids do not survive.
• Macroevolution refers to large - scale evolutionary changes, such as the emergence of new species, genera, families, etc. The disappearance of dinosaurs (a large - scale event in the history of life) is an example of macroevolution as it represents a major change in the biodiversity of the planet.
• Adaptive release is when a species expands its ecological niche.

Answer:

True

Question 8