Match the trophic levels with their correct species examples in grassland ecosystem.

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

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

Remark:

In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?

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

• Gross primary productivity is always less than net primary productivity.
• Gross primary productivity is always more than net primary productivity.
• Gross primary productivity and Net primary productivity are one and same.
• There is no relationship between Gross primary productivity and Net primary productivity.
Correct Option: B  [ Gross primary productivity is always more than net primary productivity. ]

Remark:

Which of the following regions of the globe exhibits highest species diversity?

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

• Western Ghats of India
• Madagascar
• Himalayas
• Amazon forests
Correct Option: D  [ Amazon forests ]

Remark:

Which of the following is put into Anaerobic sludge digester for further sewage treatment?

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

• Primary sludge
• Floating debris
• Effluents of primary treatment
• Activated sludge
Correct Option: D  [ Activated sludge ]

Remark:

Montreal protocol was signed in 1987 for control of:

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

• Transport of Genetically modified organisms from one country to another
• Emission of ozone depleting substances
• Release of Green House gases
• Disposal of e-wastes
Correct Option: B  [ Emission of ozone depleting substances ]

Remark:

Floridean starch has structure similar to:

NEET-(Sept)2020 Biomolecules [class-xi ]

• Starch and cellulose
• Amylopectin and glycogen
• Mannitol and algin
• Laminarin and cellulose
Correct Option: B  [ Amylopectin and glycogen ]

Remark:

The sequence that controls the copy number of the linked DNA in the vector, is termed:

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

• Selectable marker
• Ori site
• Palindromic sequence
• Recognition site
Correct Option: B  [ Ori site ]

Remark:

According to Robert May, the global species diversity is about:

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

• 1.5 million
• 20 million
• 50 million
• 7 million
Correct Option: D  [ 7 million ]

Remark:

Which of the following is correct about viroids?

NEET-(Sept)2020 Biological-Classification [class-xi ]

• They have RNA with protein coat.
• They have free RNA without protein coat.
• They have DNA with protein coat.
• They have free DNA without protein coat.
Correct Option: B  [ They have free RNA without protein coat. ]

Remark:

Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G₀). This process occurs at the end of:

NEET-(Sept)2020 Cell-Cycle-and-Cell-Division [class-xi ]

• M phase
• G₁phase
• S phase
• G₂phase
Correct Option: A  [ M phase ]

Remark: