Parasites often have one or two intermediate hosts or vectors

1. To make life cycle more complicated
2. To facilitate parasitisation of it's primary host
3. To cause advance life cycle
4. To infect a broad range of organisms

The human liver fluke

1. A trematode parasite
2. Depends on two intermediate hosts- snail and Dog
3. Both A and B
4. Simple life cycle

Which of the following is not correct with respect to parasites?

1. Harm the host
2. Reduce survival, growth of host.
3. Doesn't affect population density of host as no effect on reproduction ability of host
4. Render host more vulnerable to predation by making it physically weak.

Which of the following is not an ectoparasite ?

1. Ticks
2. Lice
3. Copepods
4. Fluke

Female mosquito

1. Needs our blood for reproduction
2. Parasite
3. Get some nutrition from our body
4. Both A and B

Endoparasites have

1. Complex life cycle
2. Complex anatomical and morphological features
3. Less emphasis on Reproductive potential
4. All of these

Endoparasites have complex life cycle

1. Because of extreme morphological adaptations
2. Because of extreme specialisation.
3. Because of extreme anatomical adaptation
4. Because of less reproductive potential

In Brood Parasitism which of the two birds are involved?

1. Cuckoo and Parrot
2. Parrot and Crow
3. Crow and Cuckoo
4. Cuckoo and Eagle

Which of the following is not an example of commensalism?

1. An orchid as an epiphyte over a mango tree
2. Barnacle on the back of whale
3. Copepods over Marine fishes
4. Cattle egret and grazing cattle

Which of the following is not an example of commensalism?

1. Orchid over mango tree
2. Barnacle on the back of whale
3. Cattle egret and grazing cattle
4. Cuscuta and hedge plants