Q: Distinguish between ecosystem and biome.
A: a. A functional unit of Biosphere in which members of the community
interact among themselves and with the surrounding environment,
involving in energy flow forming a well defined trophic structure is
known as ecosystem.
b. A large community of organisms that occupies
a vast region is known as biome.
Q: Explain bioluminiscence.
A: Light emitted by living organisms is known as bioluminiscence. As
it is devoid of infra red rays, it is called cold light.
Q: Distinguish between neuston and nekton.
A: a. The animals living at the air water interface constitute the
neuston e.g., Gerris
b. The animals having powerful swimming organs are called nekton. e.g., Fishes.
Q: What is biological magnification?
A: Increase of concentration of the pollutant at successive trophic
levels in an aquatic food chain is known as biomagnification.
Q: What is cyclomorphosis? Explain its importance in Daphnia.
A: a. the cyclical morhological change in certain organisms (according
to changes of seasons) is called cyclomorphosis. e.g., Daphnia.
b. It is an adaptation in Daphnia to float in water according to
seasonal changes in density.
Eenadu M Suresan Spoken English - Prepositions Lesson
There are no hard and fast rules for the use of prepositions. Why a
certain preposition is used before / after a word is purely a matter
of usage. Constant reading alone can be of help in the use of
prepositions. There are only rules which say which preposition can be
used before / after a word. The following are the points of usage of
certain prepositions.
On:
a) Before days of the week (Monday, Tuesday, etc., the Ist of last
month, on the 25th etc.)
b) Before rivers to indicate their banks - Vijayawada is on the
Krishna; on bus / train (Something happening). Eg: There was a quarrel
between two passengers on the bus / train / on the ship, etc.
c) on the TV / radio (programmes)
d) on something - on the table / wall / table etc.
e) sides - on the right / left / the Ist floor, etc.
f) before all topless modes of travel: on horseback / elephant /on foot
In:
a) Before months / years / seasons (in January / in 2014 / in spring,
summer etc.)
b) before parts of the day - in the morning / the evening / in the
night (at night) , in the afternoon, etc.
c) at the end of a period - in an hour / in a year, etc.
d) a place - in the room, in the class,
e) before big and important cities - in Vijayawada, Hyderabad, New York, etc.
f) in a car / taxi
At:
a) Before small places and villages (at Mehboobbad/ Mangalagiri, etc.)
b) before events / occasions (at the party / the wedding)
c) before places of activity: at college / at the meeting / the cinema (hall)
Since:
Since = from sometime in the past.
Before a point of time (Since 2013 / December / 5 O'clock, etc.)
For:
a) Over a certain period of time (for two years / for an hour etc.)
b) Kosam – This shirt is for Ramesh
c) On behalf of (He signed for the officer)
d) In support of ( I am for any good party)
By:
a) By the side of / next to (He is beside his friend)
b) Not later than (By 3 O'clock = before / at 3 O'clock)
c) Before the person who does something in the passive voice (It was
done by Ravi)
To:
a) Towards (in the direction of: He is moving towards the gate)
b) Destination
c) In the sense of doing something to somebody
certain preposition is used before / after a word is purely a matter
of usage. Constant reading alone can be of help in the use of
prepositions. There are only rules which say which preposition can be
used before / after a word. The following are the points of usage of
certain prepositions.
On:
a) Before days of the week (Monday, Tuesday, etc., the Ist of last
month, on the 25th etc.)
b) Before rivers to indicate their banks - Vijayawada is on the
Krishna; on bus / train (Something happening). Eg: There was a quarrel
between two passengers on the bus / train / on the ship, etc.
c) on the TV / radio (programmes)
d) on something - on the table / wall / table etc.
e) sides - on the right / left / the Ist floor, etc.
f) before all topless modes of travel: on horseback / elephant /on foot
In:
a) Before months / years / seasons (in January / in 2014 / in spring,
summer etc.)
b) before parts of the day - in the morning / the evening / in the
night (at night) , in the afternoon, etc.
c) at the end of a period - in an hour / in a year, etc.
d) a place - in the room, in the class,
e) before big and important cities - in Vijayawada, Hyderabad, New York, etc.
f) in a car / taxi
At:
a) Before small places and villages (at Mehboobbad/ Mangalagiri, etc.)
b) before events / occasions (at the party / the wedding)
c) before places of activity: at college / at the meeting / the cinema (hall)
Since:
Since = from sometime in the past.
Before a point of time (Since 2013 / December / 5 O'clock, etc.)
For:
a) Over a certain period of time (for two years / for an hour etc.)
b) Kosam – This shirt is for Ramesh
c) On behalf of (He signed for the officer)
d) In support of ( I am for any good party)
By:
a) By the side of / next to (He is beside his friend)
b) Not later than (By 3 O'clock = before / at 3 O'clock)
c) Before the person who does something in the passive voice (It was
done by Ravi)
To:
a) Towards (in the direction of: He is moving towards the gate)
b) Destination
c) In the sense of doing something to somebody
10th Social Studies New Syllabus - 2 and 1 Marks Questions
Q: What is the impact of sex ratio on society?
A: Number of females per every 1000 males is called sex ratio. The
unbalanced sex ratio reflects the society.
Differences in the male-female ratio create problems in marital status.
Gender imbalance will lead to a reduction in the birth rate.
Gender imbalance will lead to work force, social imbalances and gender
bias. It also leads to trafficking of women.
Q: What are the main reasons for dropouts and never enrolled in India?
A: The reasons for dropouts and never enrolled in India are as follows:
Economically backwardness
Having many children
Migration of families to other places.
Child marriages
Severe punishments by the teachers
No access of schools in nearby places.
Health problems ★ Religious factors.
Q: Why did girls not get similar opportunities for further studies as boys?
A: The reasons for girls not getting similar opportunities for further
studies as boys are:
Child marriages.
Lack of social security for the girls.
If the girls go for higher studies, the demand for dowry may be more.
Feeling the girl child as a burden and trying to fulfill their
responsibility as early as possible.
Religious factors also play a crucial role.
1 Mark Questions:
Q: What is the density of population?
A: The density of population is the number of persons living per
square kilometer of an area.
Q: What is literacy rate?
A: Percentage of population in the age group of 7 years and above, who
can read, write and understand a language is called literacy rate.
A: Number of females per every 1000 males is called sex ratio. The
unbalanced sex ratio reflects the society.
Differences in the male-female ratio create problems in marital status.
Gender imbalance will lead to a reduction in the birth rate.
Gender imbalance will lead to work force, social imbalances and gender
bias. It also leads to trafficking of women.
Q: What are the main reasons for dropouts and never enrolled in India?
A: The reasons for dropouts and never enrolled in India are as follows:
Economically backwardness
Having many children
Migration of families to other places.
Child marriages
Severe punishments by the teachers
No access of schools in nearby places.
Health problems ★ Religious factors.
Q: Why did girls not get similar opportunities for further studies as boys?
A: The reasons for girls not getting similar opportunities for further
studies as boys are:
Child marriages.
Lack of social security for the girls.
If the girls go for higher studies, the demand for dowry may be more.
Feeling the girl child as a burden and trying to fulfill their
responsibility as early as possible.
Religious factors also play a crucial role.
1 Mark Questions:
Q: What is the density of population?
A: The density of population is the number of persons living per
square kilometer of an area.
Q: What is literacy rate?
A: Percentage of population in the age group of 7 years and above, who
can read, write and understand a language is called literacy rate.
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