Migratory birds rely on an internal sense of direction to travel vast distances each year. Some species appear to use the Earth's magnetic field for navigation. Others may rely on the position of the ... https://e-sorucoz.com/test-sorular/YDS-Okuma-Sorulari-Test-4-4.soru
Invasive species can quickly overwhelm ecosystems that lack natural predators to control them. They often outcompete native species for food, space, and other resources. Some invasive species arrive a... https://e-sorucoz.com/test-sorular/YDS-Okuma-Sorulari-Test-4-5.soru
Old-growth forests contain trees that have grown undisturbed for centuries. These ecosystems typically host greater biodiversity than younger, managed forests. Their dense canopies and complex root sy... https://e-sorucoz.com/test-sorular/YDS-Okuma-Sorulari-Test-4-6.soru
Freshwater ecosystems supply drinking water to billions of people worldwide. Pollution from agriculture and industry increasingly threatens these vital water sources. Excess nutrients can trigger alga... https://e-sorucoz.com/test-sorular/YDS-Okuma-Sorulari-Test-4-7.soru
Elephants are considered a keystone species within African savanna ecosystems. By uprooting trees, they help maintain the open grasslands that other species depend on. Their seasonal migrations also d... https://e-sorucoz.com/test-sorular/YDS-Okuma-Sorulari-Test-4-8.soru
Ocean currents distribute heat around the globe, influencing regional climates significantly. The Gulf Stream, for example, carries warm water from the tropics toward Europe. This current helps keep p... https://e-sorucoz.com/test-sorular/YDS-Okuma-Sorulari-Test-4-9.soru
Bees pollinate a significant proportion of the crops humans depend on for food. Pesticide exposure has been linked to declining bee populations in several regions. Habitat loss also reduces the availa... https://e-sorucoz.com/test-sorular/YDS-Okuma-Sorulari-Test-4-10.soru
Glacial retreat has accelerated in many mountain ranges over recent decades. Meltwater from glaciers supplies rivers that millions of people depend on. As glaciers shrink, some regions face growing un... https://e-sorucoz.com/test-sorular/YDS-Okuma-Sorulari-Test-4-11.soru
Migratory salmon travel from the ocean back to the rivers where they hatched to spawn. This journey often involves swimming upstream against strong currents. Dams and other barriers can prevent salmon... https://e-sorucoz.com/test-sorular/YDS-Okuma-Sorulari-Test-4-12.soru
Soil health directly affects the productivity and sustainability of agricultural land. Overuse of chemical fertilizers can deplete beneficial microorganisms within the soil. Crop rotation and cover cr... https://e-sorucoz.com/test-sorular/YDS-Okuma-Sorulari-Test-4-13.soru
