QuestenaUn entraînement qui indique quoi revoir ensuite
RechercheCréer un test
Question 88

Besides absorbing what a plant needs from the soil, what other job does a root system do?

  1. It anchors the plant firmly in the groundBonne réponse
  2. It makes the plant's food at night
  3. It pushes all of the plant's water up the stem to the leaves
  4. It takes in the oxygen that the plant's leaves use

Explication

A root system spreads out through the soil and holds the plant in place against wind and against its own weight, which is a mechanical task quite separate from absorption. The closest rival is the idea that roots push the whole water column upwards, but that column is pulled from the top by evaporation at the leaves, and roots cannot make food at any hour either, because that needs light and the green pigment.

Continuer avec ce test

Commencer l’entraînement
Comprendre ce thème (≈5 min)Retour au test
Question 88: Besides absorbing what a plant needs from the soil, what… · Plants and Photosynthesis · Questena