Lower plants – algae
Answers are for parents and teachers.
1
Write six representatives of algae and show which group (colour) each belongs to.
Chlorella, chlamydomonas, ulothrix, spirogyra – green; laminaria – brown; porphyra – red.
2
In one sentence, write the difference between the body of algae and of higher plants.
An alga’s body is undivided (a thallus); higher plants have a root, stem and leaf.
3
Why can the water of a canal or pond turn green? Write 2–3 sentences about algae.
In warm, bright, nutrient-rich water algae multiply fast and turn the water green.
4
What can people use to avoid iodine deficiency? Recall examples from your lessons.
Iodised table salt and sea products (such as laminaria).