Question

what would happen to life on earth if all the liquid fresh water were used up?
all organisms would adapt to using salt water.
organisms would carry out life functions without water.
animals would be affected, but some desert plants would survive.
life could no longer exist on earth.

Explanation:

• Option 1: Most organisms can't adapt to salt water quickly or at all, as their cells and physiological processes are adapted to fresh water (e.g., osmotic balance issues).
• Option 2: Water is essential for life functions like metabolism, transport, and chemical reactions in cells; no known life can function without water.
• Option 3: Desert plants also need water (even if they are adapted to low - water environments) and animals depend on water - related ecosystems. Without fresh water, the water cycle and availability of water for all organisms would collapse, so desert plants wouldn't survive either.
• Option 4: Water is a fundamental requirement for all known life on Earth. All living organisms, from the smallest bacteria to complex animals and plants, need water for essential biological processes. If all liquid fresh water were used up, the necessary conditions for life (like hydration, nutrient transport, and metabolic reactions) would not be met, and life as we know it could not exist.

Answer:

D. Life could no longer exist on Earth.