Cómo Sobreviven los Árboles en Invierno

Trees originally evolved in tropical climates and are not naturally equipped for sub-zero temperatures. Cold weather poses challenges like ice formation and air bubbles in tree pipes, which can disrupt water flow. To survive, trees have developed adaptations such as narrower pipes to prevent bubble blockages and techniques like using sugary sap as antifreeze. These adaptations also help in drought conditions. Some trees, like conifers, use sugary sap to keep leaves thawed, while others shed leaves to avoid frost damage. These strategies have allowed trees to thrive in both cold and dry tropical climates.

What happens to tropical trees when they are exposed to sub-zero temperatures?

• Their leaves become more vibrant.

• Their water transport system becomes more efficient.

• Ice crystals form, damaging their cells.

• They grow faster.

Why are air bubbles a problem for trees during droughts?

• They make the tree more susceptible to pests.

• They cause the leaves to fall off.

• They block the water transport system.

• They increase the tree's growth rate.

How did trees in dry tropics adapt to avoid air bubbles?

• By shedding their leaves.

• By developing wider pipes.

• By growing taller.

• By developing narrower pipes.

What is one method trees use to prevent leaf frost?

• Using sugary sap as an antifreeze.

• Growing thicker bark.

• Increasing root depth.

• Producing more leaves.

Why is sugary sap considered a unique adaptation for cold climates?

• It acts as a biological antifreeze.

• It helps trees grow faster.

• It attracts more sunlight.

• It is only useful in warm climates.