FRANK Solutions for Class 9 Biology Chapter 11 - Understanding EcoSystems
Chapter 11 - Understanding EcoSystems Exercise 94
(i) Ecosystem may be defined as
(a) a species along with environment.
(b) plants found in water
(c) plants found on land
(d) all plants and animal species along with environment.
(ii) A pond/ lake is
(a) a biome
(b) a natural ecosystem
(c) an artificial ecosystem
(d) a community of plants and animals only
(iii) Biome is
(a) the fauna of an ocean
(b) the flora of land
(c) communities of organisms interacting with one another
(d) the part of the earth and its atmosphere which is inhabited by living organisms.
(iv) Word ecosystem was coined by
(v) Annual rainfall in the area of deciduous forest is
(a) over 300 cm
(b) 200-250 cm
(c) 100-150 cm
(d) 50-75 cm
(vi) Which one is not a factor of the abiotic environment?
(ii) (c) an artificial ecosystem
(iii) (c) communities of organisms interacting with one another
(iv) (c) Tansley
(v) (c) 100-150 cm
(vi) (b) Decomposers
(i) It includes a complex assemblage of different kinds of biotic and abiotic factors.
(ii) The temperature and rainfall conditions of a place determine the nature and characteristics of forests.
Tropical rainforests mainly occur inside the World's equatorial regions. They are restricted to the small land area between the Tropic of Capricorn and the Tropic of Cancer.
Features of forest biomes are:
(i) In tropical rainforest biomes, there is an amazing biodiversity of plants and animals. Trees are tall, with buttressed trunks and shallow roots, mostly evergreen, with large dark green leaves. Plants such as orchids, bromeliads, vines, lianas, ferns, mosses, and palms are present in tropical forests. Fauna include numerous birds, bats, amphibians, reptiles, small mammals, and a huge diversity of insects.
(ii) In deciduous rainforest biomes, many types of tall and short trees, shrubs, herbs, mosses and lichens are found occupying five different layers. Also a huge variety of fauna like panda, brown bear, hedgehog etc are found.
(iii) Not much biodiversity occurs in coniferous forest biomes. The trees here are found in single strands with no undergrowth. Plants predominantly found here include firs, pines, spruces and hemlock while the ground is covered with mosses, grasses, sedges and herbs that are adapted to cold. Fur bearing animals are found abundantly like brown bear, fox, mink, beavers, deer and large birds of prey like red tailed hawks. Many animals migrate or hibernate during the extremely cold winters.
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