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Chapters
1: Reproduction in Organisms
2: Sexual Reproduction in Flowering Plants
3: Human Reproduction
4: Reproductive Health-Problems and Strategies
Unit 2 – Genetics and Evolution
5: Principles of Inheritance and Variation
6: Chromosomes, Sex-Linked Inheritance and Human Genetic Disorders
7: Molecular Basis of Inheritance
8: Evolution-Origin of Life
9: Theory of Evolution and Evolution of Man
Unit 3 – Biology and Human Welfare
10: Human Health and Diseases
11: Adolescent Issues: Alcoholism and Drugs
12: Animal Breeding for Improvement in Food Production
13: Plant Breeding to Enhance Food Production
14: Microbes in Human Welfare
Unit 4 – Biotechnology
15: Biotechnology: Principles and Processes
16: Biotechnology and Its Applications
Unit 5 – Ecology and Environment
▶ 17: Organisms and Populations
Chapter 18: Ecosystem
Chapter 19: Biodiversity and Conservation
Chapter 20: Environmental Issues
![Sarita Aggarwal solutions for बायोलॉजी [इंग्रजी] इयत्ता १२ आईएससी chapter 17 - Organisms and Populations - Shaalaa.com](/images/biology-english-class-12-isc_6:65d11b7ee3eb4277bbdac77874c6c42a.jpg "Sarita Aggarwal solutions for बायोलॉजी [इंग्रजी] इयत्ता १२ आईएससी chapter 17 - Organisms and Populations")
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Solutions for Chapter 17: Organisms and Populations
Below listed, you can find solutions for Chapter 17 of CISCE Sarita Aggarwal for बायोलॉजी [इंग्रजी] इयत्ता १२ आईएससी.
Sarita Aggarwal solutions for बायोलॉजी [इंग्रजी] इयत्ता १२ आईएससी 17 Organisms and Populations EXERCISES [Pages 951 - 952]
A. OBJECTIVE QUESTIONS I. Multiple choice question Choose the correct answer:
The outward movement of members of a species is known as ______.
immigration
emigration
migration
mortality
The natality is also known as ______.
birth rate
death rate
net increase
net decrease
The maximum capacity of an organism to reproduce or increase in number is termed as ______.
natality
mortality
biotic potential
carrying capacity
A stronger species like lion and deer being benefitted at the cost of another weak species is an example of ______.
predation
parasitism
competition
commensalism
The relationship of sea anemone and hermit crab is called ______.
predation
commensalism
protocooperation
competition
The interaction of Rhizobium with root nodules of legume plants is called ______.
predation
commensalism
symbiosis
parasitism
In commensalism, the relationship of species A and species B is such that ______.
A and B both are benefitted
A is benefitted and B is harmed
A is benefitted and B is not affected
A and B both are harmed
Community is defined as aggregation of ______.
individuals of the same kind
individuals of different kinds
individuals of a population
population of different species
Parasite can be explained as an organism which depends on others ______.
for food
for shelter
for both food and shelter
for reproduction
Select the statement which explains best parasitism.
One organism is benefited.
Both the organisms are benefited.
One organism is benefited, other is not affected.
One organism is benefited, other is affected.
A group of individuals inhabiting a particular area form a ______.
population
community
ecosystem
species
A large regional, terrestrial unit characterised by a major vegetation type and associated fauna forms ______.
landscape
biome
ecosystem
community
The short-term changes of the atmosphere at a given place and time form the ______.
environment
weather
climate
topography
The functional role of an organism in the ecological system is referred as ______.
habitat
interaction
niche
symbiosis
A thin layer of ozone is present in ______.
troposphere
stratosphere
stratopause
mesosphere
In troposphere, the temperature ______.
remains constant
remains below 0°C
increases with increasing height
decreases with increasing height
Which of the following is photosynthetically active radiation?
X-rays
ultraviolet
infrared
visible light
The shallow water zone around the edge of the lake is called ______.
littoral zone
limnetic zone
profundal zone
benthic zone
Another term for cold-blooded animals is ______.
endotherms
ectotherms
homoiotherms
thermoregulators
During summer stratification, the upper layer of water is called ______.
thermocline
hypolimnion
epilimnion
ectolimnion
Upper limit of water availability in the soil is also called ______.
capillary water
field capacity
hygroscopic water
gravitational water
The fresh leaves and recognisable litter are found in the following horizon of soil ______.
A-horizon
B-horizon
C-horizon
O-horizon
Solutions for 17: Organisms and Populations
Sarita Aggarwal solutions for बायोलॉजी [इंग्रजी] इयत्ता १२ आईएससी chapter 17 - Organisms and Populations
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