Question

Question 26:
When an alien species (plant or animal) that does not belong to an ecosystem is introduced it
spreads and competes with the native plants for space and nutrients and becomes problematic
in the absence of natural enemies. These intruders are called invasive alien species.
What are the ill effects of an invasive species like water hyacinth?
i Blockage of sunlight from reaching native aquatic plants
Starving the water of carbon dioxide
Domination and phasing out of fish and other native species
Change in the water quality with respect to the dissolved oxygen and the water pH due
to release of CO,
Starving the water of oxygen
Desilting of the water body
An increase in algae blooms, mosquito infestation due to dense matting and decreased
water flow
SS
a) i. 11, ill. iv, v
b) i, u, V, VII, IV
c) ili, v. vi, vii
d) ini, IV, V, Vi​

Answer 1

Answer:

However, when these alien species begin to have negative consequences in the new habitat, they are called invasive species. Invasive species may cause environmental harm, economic harm, or impact human health. A key factor that makes many species invasive is a lack of predators in the new environment

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