Question

1. Read the following newspaper article and answer the questions which follow.

BIODIVERSITY IS THE KEY TO MANAGING ENVIRONMENT

An ecosystem that retains a high biodiversity (that is, a wide variety of living things) is much more likely to adapt

to human-caused environment change than is one that has little.

Consider the two food webs shown in the diagram. The arrows point from the organism that gets eaten to

the one that eats it. These food webs are highly simplified compared with food webs in real ecosystems, but they

still illustrate a key difference between more diverse and less diverse ecosystems.

Food web B represents a situation with very low biodiversity, where at some levels the food path involves

only a single type of organism. Food web A represents a more diverse ecosystem with, as a result, many more

alternative feeding pathways.

Generally, loss of biodiversity should be regarded seriously, not only because the organisms that have

become extinct represent a big loss for both ethical and utilitarian (useful benefit) reasons, but also because the

organisms that remain have become more vulnerable (exposed) to extinction in the future.




I) In the article it is stated that “Food web A represents a more diverse ecosystem with, as a result, many

more alternative feeding pathways.”

Look at FOOD WEB A. Only two animals in this food web have three direct (immediate)

food sources. Which two animals are they?

A) Native Cat and Parasitic Wasp

B) Native Cat and Butcher Bird

C) Parasitic Wasp and Leaf Hopper

D) Parasitic Wasp and Spider

E) Native Cat and Honeyeater




II) How many food chains are their in food web B in the given figure :

A) 4

B) 5

C) 3

D) 1



III) Which food web has a complex structure?

A) Food web A

B) Food web B

C) Both food web A and B

D) None of these

Answer 1

Answer:

1 question:B

2 question:c

3 question:a