Available Answers

1. 1.

   What causes communicable diseases? How do they spread?
2. 2.

   What helps cacti survive well in deserts?
3. 3.

   Mention one characteristic of aquatic plants.

4. 4.

   How are parasites different from carnivores?
5. 5.

   What is the water cycle?
6. 6.

   How do decomposers help to keep the soil fertile?