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Pearson IIT Foundation Series - Biology Class 8

Trishna Knowledge Systems

Chapter 6

Ecosystem and Biodiversity - all with Video Answers

Educators

VS
JC

Chapter Questions

01:14

Problem 1

Fill in the blanks in each question.
Organisms that feed on plants are called ____ .

VS
Vivek Singh
Numerade Educator
01:28

Problem 2

Fill in the blanks in each question.
Animals that cannot synthesize food and which depend on other organisms for food are called ____ .

VS
Vivek Singh
Numerade Educator
01:21

Problem 3

Fill in the blanks in each question.
____ is the functional unit of nature.

VS
Vivek Singh
Numerade Educator
01:36

Problem 4

Fill in the blanks in each question.
Microbes and insects are included in _____ factors of an ecosystem.

VS
Vivek Singh
Numerade Educator
01:24

Problem 5

Fill in the blanks in each question.
Interconnected food chains are called _____ .

VS
Vivek Singh
Numerade Educator
01:37

Problem 6

Fill in the blanks in each question.
Organisms that feed on both plant and animals are ____ .

VS
Vivek Singh
Numerade Educator
01:34

Problem 7

Fill in the blanks in each question.
Organisms that feed on dead and decaying matter are _____ .

VS
Vivek Singh
Numerade Educator
01:24

Problem 8

Fill in the blanks in each question.
Biomagnification is also known as ____ .

VS
Vivek Singh
Numerade Educator
01:24

Problem 9

Fill in the blanks in each question.
Substances that cause pollution are ___ .

VS
Vivek Singh
Numerade Educator
01:29

Problem 10

Fill in the blanks in each question.
Animals that carry disease-causing microbes are called _____ .

VS
Vivek Singh
Numerade Educator
01:31

Problem 11

Fill in the blanks in each question.
Kaziranga National Park protects _____ .

VS
Vivek Singh
Numerade Educator
01:52

Problem 12

Fill in the blanks in each question.
Bharatpur Bird Sanctuary is an example for ____ conservation.

VS
Vivek Singh
Numerade Educator
01:32

Problem 13

Fill in the blanks in each question.
Organisms that are found only in a particular area are called _____ .

VS
Vivek Singh
Numerade Educator
01:48

Problem 14

Fill in the blanks in each question.
Extinction of a parasite along with extinction of its specific host is an example of _____ .

VS
Vivek Singh
Numerade Educator
01:25

Problem 15

Fill in the blanks in each question.
Full form of IUCN is ____ .

VS
Vivek Singh
Numerade Educator
01:31

Problem 16

Fill in the blanks in each question.
World environment day is _____ .

VS
Vivek Singh
Numerade Educator
01:57

Problem 17

Fill in the blanks in each question.
Species that are likely to move into endangered category are _____ .

VS
Vivek Singh
Numerade Educator
01:27

Problem 18

Fill in the blanks in each question.
Passenger pigeon is an example of _____ .

VS
Vivek Singh
Numerade Educator
01:13

Problem 19

Which one of the following is a herbivore?
(a) Man
(b) Deer
(c) Lion
(d) Bear

VS
Vivek Singh
Numerade Educator
01:24

Problem 20

The green pigment that traps solar energy during photosynthesis is
(a) Anthocyanin
(b) Carotenoid
(c) Haemoglobin
(d) Chlorophyll

VS
Vivek Singh
Numerade Educator
01:17

Problem 21

Organisms that feed on herbivores are
(a) Decomposers
(b) Carnivores
(c) Omnivores
(d) Producers

VS
Vivek Singh
Numerade Educator
01:28

Problem 22

In a food chain, energy flows from
(a) Higher trophic to lower trophic levels.
(b) From consumer to producer.
(c) From lower trophic to higher trophic levels.
(d) From higher to lower trophic levels and vice versa.

VS
Vivek Singh
Numerade Educator
01:27

Problem 23

The amount of energy ______ from higher trophic to lower trophic levels.
(a) Increases
(b) Decreases
(c) Remains the same
(d) Cannot be predicted

VS
Vivek Singh
Numerade Educator
02:11

Problem 24

Match the following
A. Gascous emission
i Water pollution
B. Agricultural wastes
ii Mosquito
C. Cholera
iii. Air pollution
D. Carriers
iv Soil pollution
A $\mathbf{B}$ C $\mathrm{D}$
(a) $\mathrm{i}$ iv iii ii
(b) iii iv ii $\mathrm{i}$
(c) iv iii $\mathrm{i}$ ii
(d) iii iv i ii

VS
Vivek Singh
Numerade Educator
01:31

Problem 25

Which one of the following is a wrong statement?
(a) Accumulation of toxic substances increases from lower trophic to higher trophic levels.
(b) Energy reduces as it flows from producer to consumer.
(c) Energy reduces as it moves from lower trophic to higher trophic levels.
(d) Energy content will be high in carnivores than herbivores in a food chain.

VS
Vivek Singh
Numerade Educator
01:44

Problem 26

Desert and forest are examples of
(a) Genetic diversity
(b) Ecological diversity
(c) Habitat diversity
(d) None of the above

VS
Vivek Singh
Numerade Educator
01:51

Problem 27

Deforestation will result in extinction of many species due to
(a) Overexploitation
(b) Co-extinction
(c) Habitat loss
(d) Introduction of exotic species

VS
Vivek Singh
Numerade Educator
01:23

Problem 28

Lion-tailed macaques are protected in
(a) Silent Valley National Park
(b) Kaziranga National Park
(c) Bharatpur Bird Sanctuary
(d) Satpura National Park

VS
Vivek Singh
Numerade Educator
04:47

Problem 29

Which one of the following is a correct statement?
(a) Overexploitation of species helps in increasing population number of many species.
(b) Silent Valley National Park is an example of in situ conservation method which conserves wildlife outside its natural habitat.
(c) Endemic species are organisms that are found only in a particular area.
(d) Biodiversity refers to genetic and species diversity only.

JC
Jyoti Choudhary
Numerade Educator
01:25

Problem 30

The record that includes all flora and fauna that are on the verge of extinction is
(a) Blue Data Book
(b) Red Data Book
(c) Green Data Book
(d) None of the above

VS
Vivek Singh
Numerade Educator
02:04

Problem 31

Ex-situ conservation meant for protecting endangered plant species under artificial conditions is _____ .
(a) Zoological garden
(b) Red Data Book
(c) Museum
(d) Botanical garden

VS
Vivek Singh
Numerade Educator
View

Problem 32

Match the following.
A. Endangered
$-$ (i) Species that are species likely to move into endangered category
B. Vulnerable $-$
(ii) Species that have species disappeared
C. Extinct species -
(iii) Species that are on the verge of extinction
D. Rare species
(iv) Species that are thinly distributed

VS
Vivek Singh
Numerade Educator
02:08

Problem 33

Match the following
A. World water day
(i) June 5
B. World animal day
(ii) December 3
C. World conservation day
(iii) March 22
D. World environment day
(iv) October 3
$\begin{array}{llll}\mathbf{A} & \mathbf{B} & \mathbf{C} & \mathbf{D}\end{array}$
(a) (i) (iiii)
(i)
(iv)
(b) (iii)
(iv)
(ii)
(i)
$\begin{array}{llll}\text { (c) (iii) } & \text { (iv) } & \text { (iii) } & \text { (i) }\end{array}$
(d) (ii)
(i)
(iv)

VS
Vivek Singh
Numerade Educator
01:21

Problem 34

Write the full form WWE.

VS
Vivek Singh
Numerade Educator
01:49

Problem 35

Biological diversity day is
(a) March 21
(b) December 29
(c) April 22
(d) June 5

VS
Vivek Singh
Numerade Educator