OBJECTIVE FORESTRY

Detailed explanation-1: -This is the kind of parasitism in which the parasite is completely dependent on the host to complete its life cycle. Obligate parasites cannot survive without the host. Therefore, they do not severely harm the host. Fungi, bacteria and viruses exhibit obligate parasitism.

Detailed explanation-2: -Parasites are plants or animals that live in or on another living thing, getting their food from it while it is still alive. The organisms that they live on are called hosts. Hosts never benefit from parasites. In fact, some parasites eventually cause their hosts to die.

Detailed explanation-3: -Toxins: Apart from disease and death, parasites can produce poisonous substances in the form of secretions, excretions or other products such as proteolytic enzymes and pigments. These can harm or sensitize the host, for example, Schistosome cercariae, Entamoeba histolytica and Malaria parasites [5].