31
27-Among the mammals found on mangroves : a- dolphins.
b-manatees.
28-manatees : a- are huge large animals.
b-are small animals.
29-Human activities : a-have dwindled the number of these animals
in some areas.
b-did not affect the existence of these animals.
30-Mangroves : a- can help reduce the impact of erosion.
b-can not rduce the impact of erosion.
31-Mangroves : a- can provide humans with food , wood medecines.
b-can not be exploited by Humans.
32-Mangroves are damaged by Humans to build different kind of
infrastructures : a- true.
b-false.
Exercise 2 : Answer the following questions :
1-What are salt marshes ? where do they grow ?
2-What are the different types of salt marshes. ?what is the difference
between them ?
3-what is the source of nutrients in salt marshes ?
4-What do control the distribution of plants in salt marshes ?
5-What kind of animals inhabit salt marshes ?
6-what kind of salt marshes that is more productive ?
7-what is a mangrove ?where doesi it grow ?
8-How do we call the roots of a mangrove ?
9-What kind of fauna do we find in mangroves ?
10-What are the advantages of mangroves ?