Environmental Biology Past Papers

[OBJECTIVE]

Subject: Environmental Biology

Time Allowed: 15 Minutes

Maximum Marks: 10

NOTE: Attempt this Paper on this Question Sheet only. Please encircle the correct option. Division of marks is given in front of each question. This Paper will be collected back after expiry of time limit mentioned above.

 

Part-I Encircle the right answer, cutting and overwriting is not allowed. (10)

1. Organic wastes (as animal wastes and plant debris) in water can
(a) Deplete dissolved Oxygen of Water
(b) Cause Cancer
(c) Cause Excessive Growth of Algae
(d) Reduce Photosynthesis
2. Pollutant gas that reacts in the presence of sunlight to produce Ozone is
(a) SO2
(b) NH3
(c) NO2
(d) Cl2
3. Major contribution in global warming is that of
(a) CFC
(b) Methane
(c) CO2
(d) N2O
4. Coal, Oil and Gas are produced as a result of
(a) Photosynthetic activity of past millions of years
(b) Abiotic Activity
(c) Current Photosynthetic Activity
(d) None of a, b or c
5. A species abundant in its natural range but with declining population is said to be
(a) Extinct species
(b) Threatened species
(c) Endangered species
(d) Indicator Species
6. Mark out dominant component of Photochemical Smog
(a) O3
(b) PAN
(c) SO2
(d) NO2
7. Symptoms of Fluoride injury appears on leaves of sensitive plant species as
(a) Necrosis
(b) Chlorosis
(c) Bleaching
(d) Silvering & Bronzing
8. Higher the ICV, higher is the radio sensitivity in
(a) Higher animals
(b) Lower plants
(c) Insects
(d) Higher plants
9. Which one is a non-renewable resource?
(a) Wild life
(b) Forests
(c) Natural Gas
(d) Water
10. Radiation that can travel a distance of only a few centimeters in the air is
(a) Alpha Particles
(b) Beta Particles
(c) Gamma Rays
(d) X-Rays

[SUBJECTIVE]

Subject: Environmental Biology

Time Allowed: 2 Hour and 45 Minutes

Maximum Marks: 50

NOTE: ATTEMPT THIS (SUBJECTIVE) ON THE SEPARATE ANSWER SHEET PROVIDED.

 

Part-II Give short answers, Each question carries equal marks. (20)

Q#1: Importance of Forests and Deforestation

Q#2: Adverse effects of Air Pollution on plant growth

Q#3: Sources of Water Pollution

Q#4: The Fallout Problem

Q#5: Impacts of Thermal Pollution.

 

Part-III Give detailed answers, Each question carries equal marks. (30)

Q#1: What do you understand by Environmental Crisis? Briefly discuss adverse effects of

(a) Global Warming

(b) Ozone Hole

(c} Acid Rain

Q#2: Define and classify pesticides. Give an account of their characteristics and environmental problems associated with their extensive use.

Q#3: What is Smog, its causes and types? Explain mechanism of its formation. Give an account Smog related respiratory diseases and its general adverse effects


[OBJECTIVE]

Subject: Environmental Biology

Time Allowed: 15 Min

Total Marks: 10

NOTE: ATTEMPT THIS PAPER ON THIS QUESTION SHEET ONLY. Division of marks is given in front of each question. This Paper will be collected back after expiry of time limit mentioned above.

 

Part-I Encircle the correct option, each question carries equal marks. (10)

1. Tropical forests cover about % of the earth land area.
a) 6
b) 10
c) 60
d) 20
2. _______________ is not a greenhouse gas.
a) CFCs
b) Nitrous oxide
c) Methane
d) Ethane
3. Hot spots are:
a) Areas subjected to frequent fires
b) Area rich in biodiversity
c) Area rich in unique species
d) Area once had extinct species
4. Ozone depleting chemicals include:
a) Halons
b) Methyt bromide
c) Carbon tetrachloride
d) All of above
5. ________ tells us about proportion of individuals of different ages in a population.
a) Fecundity schedule
b) Life table
c) Age distribution graph
d) Survivorship curves
6. Intrinsic per capita rate of increase ‘r’ is equal to maximum per capita rate of increase r, when
a) Population size is high
b) Population size is low
¢) Value of K is high
d) All of above
7. _________ are formed at high temperature in incinerator during reaction with chlorine and hydrocarbons.
a) Dioxins
b) PCBs
c) MTBE
d) Ozone
8. A declining population have age distribution curve with maximum number of:
a) New born
b) Youngster
c) aged
d) all age groups
9. An annual reproducing population with initial population size of 446 individuals and geometric rate of increase is 1.7, what will be the population size after 2 years?
a) 758
b) 1,288
c) 2,244
d) 564
10. Intolerance model, Climax community;
a) Can be present at early stage
b) Modify the environment
c) Prevent other community to establish that area
d) None of these

[SUBJECTIVE]

Subject: Environmental Biology

Time Allowed: 2 Hour 45 Min

Total Marks: 50

NOTE: ATTEMPT THIS (SUBJECTIVE) ON THE SEPARATE ANSWER SHEET PROVIDED

 

Part-II Give short answers, each question carries equal marks. (20)

Q#1: How exponential growth equation can be converted into logistic growth equation?

Q#2: Define biomass accumulation model.

Q#3: What information a survivorship curve can provide?

Q#4: What is sustainable growth?

Q#5: What do you mean by particulate air pollution?

Q#6: What is chemical warfare?

Q#7: What factors in your life are contributing to water pollution? State any two of them.

Q#8: Define Biochemical pesticides with example.

Q#9: Per capita rate of increase depends on body size. Comment.

Q#10: Define sex ratio.

 

Part-III Give detailed answers, each question carries equal marks. (30)

Q#1: Explain MECHANISM OF SUCCESSION.

Q#2: Write a note on sources, impacts, and control of LAND POLLUTION.

Q#3: Discuss the environmental limits of POPULATION GROWTH.