Pregunta 8

A homework answer on the photosynthesis word equation states that a leaf takes the water it needs straight from the air around it. Which statement corrects that claim?

The leaf soaks the water up as vapour through its own surface
The water is made inside the leaf from the gas taken in from the air
The water is absorbed from the soil by the roots and carried to the leavesRespuesta correcta
The water is absorbed from the soil by the roots together with ready-made food

Explicación

Soil water is taken in by the roots and travels up the stem to the leaves, where photosynthesis uses it, so the supply route runs upwards from below ground. A leaf surface does not soak up water vapour, and roots bring the plant no ready-made food: what they deliver is moisture and dissolved minerals.

Explicación

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