Match the items in Column-I with those in Column-II :

NEET-(Oct)2020 Organisms-and-Populations [class-xii ]

• (A)-(IV), (B)-(II), (C)-(I), (D)-(III)
• (A)-(III), (B)-(II), (C)-(IV), (D)-(I)
• (A)-(II), (B)-(I), (C)-(III), (D)-(IV)
• (A)-(I), (B)-(III), (C)-(IV), (D)-(II)
Correct Option: B  [ (A)-(III), (B)-(II), (C)-(IV), (D)-(I) ]

Remark:

The impact of immigration on population density is:

NEET-(Oct)2020 Organisms-and-Populations [class-xii ]

• Negative
• Both positive and negative
• Neutralized by natality
• Positive
Correct Option: D  [ Positive ]

Remark:

According to Alexander von Humboldt:

NEET-(Oct)2020 Organisms-and-Populations [class-xii ]

• Species richness decreases with increasing area of exploration
• Species richness increases with increasing area, but only up to limit
• There is no relationship between species richness and area explored.
• Species richness goes on increasing with increasing area of exploration
Correct Option: B  [ Species richness increases with increasing area, but only up to limit ]

Remark:

The rate of decomposition is faster in the ecosystem due to following factors except:

NEET-(Oct)2020 Ecosystem [class-xii ]

• Detritus rich in sugars
• Warm and moist environment
• Presence of aerobic soil microbes
• Detritus richer in lignin and chitin
Correct Option: D  [ Detritus richer in lignin and chitin ]

Remark:

Which of the following statements is incorrect?

NEET-(Oct)2020 Ecosystem [class-xii ]

• Biomass decreases from first to fourth trophic level
• Energy content gradually increases from first to fourth trophic level
• Number of individuals decreases from first trophic level to fourth trophic level
• Energy content gradually decreases from first to fourth trophic level
Correct Option: B  [ Energy content gradually increases from first to fourth trophic level ]

Remark:

Which of the following statements is incorrect regarding the phosphorus cycle?

NEET-(Oct)2020 Ecosystem [class-xii ]

• Phosphates are the major form of phosphorus reservoir
• Phosphorus solubilising bacteria facilitate the release of phosphorus from organic remains
• There is appreciable respiratory release of phosphorus into atmosphere
• It is sedimentary cycle
Correct Option: C  [ There is appreciable respiratory release of phosphorus into atmosphere ]

Remark:

In the following in each set a conservation approach and an example of method of conservation are given:
A. In situ conservation - Biosphere Reserve
B. Ex situ conservation - Sacred groves
C. In situ conservation - Seed bank
D. Ex situ conservation - Cryopreservation
Select the option with correct match of approach and method:

NEET-(Oct)2020 Biodiversity-and-Conservation [class-xii ]

• (A) and (C)
• (A) and (D)
• (B) and (D)
• (A) and (B)
Correct Option: B  [ (A) and (D) ]

Remark:

Air (Prevention and Control of Pollution) Act was amended in 1987 to include among pollutants:

NEET-(Oct)2020 Environmental-Issues [class-xii ]

• Vehicular exhaust
• Allergy causing pollen
• Noise
• Particulates of size 2.5 micrometer or below
Correct Option: C  [ Noise ]

Remark:

For the commercial and industrial production of Citric Acid, which of the following microbes is used?

NEET-(Oct)2020 Microbes-in-Human-Welfare [class-xii ]

• Aspergillus niger
• Lactobacillus sp
• Saccharomyces cerevisiae
• Clostridium butylicum
Correct Option: A  [ Aspergillus niger ]

Remark:

Spooling is:

NEET-(Oct)2020 Biotechnology-Principles-and-Processes [class-xii ]

• Amplification of DNA
• Cutting of separated DNA bands from the agarose gel
• Transfer of separated DNA fragments to synthetic membranes
• Collection of isolated DNA
Correct Option: D  [ Collection of isolated DNA ]

Remark: