QuestenaPráctica que te muestra qué repasar después
Pregunta 68

Which of these statements about phloem tissue is false?

  1. Its sieve tube cells are living cells
  2. Companion cells lie alongside the sieve tube cells
  3. It is made of dead, empty tubes with no living contentsRespuesta correcta
  4. It is a living tissue, unlike the water-carrying vessels beside it

Explicación

Phloem keeps its cells alive: each conducting cell retains its contents and works together with a smaller neighbour, and that living machinery is what allows sugar to be loaded and unloaded along the route. Emptiness and death describe the water-carrying vessels instead, and swapping the two tissues on this point is the same slip as believing that sugar rises with the water.

Continúa con este test

Empezar la práctica
Pregunta 68: Which of these statements about phloem tissue is false? · Plants and Photosynthesis · Questena