Question

Answer question numbers on the basis of your understanding
of the following paragraph and the related studied concepts.
An ecosystem that retains a high biodiversity is much more likely to adapt to human- caused
environment change than in one that has little.
Consider the two food webs shown below.

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,
as a result , there are many more alternative feeding pathways. Generally, loss of biodiversity
should be regarded a serious issue, not only because the organisms that have become extinct
represent a big loss but also because the organisms that remain have become more exposed to
extinction in the future.
(a) Food webs A and B are in different locations. If leaf hoppers died out in both locations, what
would be the effect on the food webs?
(b) The first trophic level in a food chain is always a green plant. Why?
(c) In food web A only two animals have three immediate food sources. Which two animals are
they?
(d) Flow of energy in an ecosystem is always
(i) Unidirectional (iii) bidirectional
(ii) Multidirectional (iv) no specific direction

Answer 1

Answer:

a) food web will be disturbed

b) Because green plants are producers , they can make their own food

c) primary and secondary consumers

d) unidirectional