In Some Species of Flowering Plants,pollen from Unrelated Species May

question 27

Multiple Choice

In some species of flowering plants,pollen from unrelated species may germinate on the female stigma,but the pollen tube grows only a short distance and fertilization does not occur.This is an example of ___ isolation.

• A) species
• B) temporal
• C) behavioral
• D) ecological
• E) mechanical

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Definitions:

Crowding-out Effects

The phenomenon where increased government spending leads to a reduction in private sector spending.

Supply-siders

Supply-siders are economists or policymakers who believe that reducing tax rates and regulatory barriers to production and investment can stimulate supply, leading to economic growth.

Aggregate Supply

The total supply of goods and services that firms in an economy are willing and able to produce at different price levels during a specific time period.

Automatic Stabilizers

Changes in fiscal policy that stimulate aggregate demand when the economy goes into a recession without policymakers having to take any deliberate action