Identify the correct statements:
A. Detrivores perform fragmentation.
B. The humus is further degraded by some microbes during mineralization.
C. Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching.
D. The detritus food chain begins with living organisms.
E. Earthworms break down detritus into smaller particles by a process called catabolism.

NEET-2023 Ecosystem [class-xii ]

• D, E, A only
• A, B, C only
• B, C, D only
• C, D, E only
Correct Option: B  [ A, B, C only ]

Remark:

In the equation GPP – R = NPP
GPP is Gross Primary Productivity
NPP is Net Primary Productivity.

R here is:

NEET-2023 Ecosystem [class-xii ]

• Reproductive allocation
• Photosynthetically active radiation
• Respiratory quotient
• Respiratory loss
Correct Option: D  [ Respiratory loss ]

Remark:

The historic Convention on Biological Diversity, "The Earth Summit" was held in Rio de Janeiro in the year:

NEET-2023 Biodiversity-and-Conservation [class-xii ]

• 2002
• 1992
• 1985
• 1986
Correct Option: B  [ 1992 ]

Remark:

Among "The Evil Quartet", which one is considered the most important cause driving extinction of species?

NEET-2023 Biodiversity-and-Conservation [Class-X ]

• Co-extinctions
• Habitat loss and fragmentation
• Over exploitation for economic gain
• Alien species invasions
Correct Option: B  [ Habitat loss and fragmentation ]

Remark:

The thickness of ozone in a column of air in the atmosphere is measured in terms of:

NEET-2023 Environmental-Issues [class-xii ]

• Kilobase
• Dobson units
• Decameter
• Decibels
Correct Option: B  [ Dobson units ]

Remark:

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: In gymnosperms the pollen grains are released from the microsporangium and carried by air currents.
Reason R: Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed.
In the light of the above statements, choose the correct answer from the options given below:

NEET-2023 plant-kingdom [class-xi ]

• A is false but R is true
• Both A and R are true and R is the correct explanation of A
• Both A and R are true but R is NOT the correct explanation of A
• A is true but R is false
Correct Option: D  [ A is true but R is false ]

Remark:

Given below are two statements: One is labelled as Assertion A and the other islabeled as Reason R:
Assertion A: A flower is defined as modified shoot wherein the shoot apical meristem changes to floral meristem.
Reason R: Internode of the shoot gets condensed to produce different floral appendages laterally at successive nodes instead of leaves.
In the light of the above statements, choose the correct answer from the options given below:

NEET-2023 Anatomy-of-Flowering-Plants [class-xi ]

• A is false but R is true.
• Both A and R are true and R is the correct explanation of A.
• Both A and R are true but R is NOT the correct explanation of A
• A is true but R is false.
Correct Option: B  [ Both A and R are true and R is the correct explanation of A. ]

Remark:

Identify the correct statements:
A. Lenticels are the lens-shaped openings permitting the exchange of gases.
B. Bark formed early in the season is called hard bark.
C. Bark is a technical term that refers to all tissues exterior to vascular cambium.
D.Bark refers to periderm and secondary phloem.
E. Phellogen is single-layered in thickness.
Choose the correct answer from the options given below:

NEET-2023 Anatomy-of-Flowering-Plants [class-xi ]

• B and C only
• B, C and E only
• A and D only
• A, B and D only
Correct Option: C  [ A and D only ]

Remark:

Melonate inhibits the growth of pathogenic bacteria by inhibiting the activity of:

NEET-2023 Biomolecules [class-xi ]

• Dinitrogenase
• succinic dehydrogenase
• Amylase
• Lipase
Correct Option: B  [ succinic dehydrogenase ]

Remark:

Match List-I with List-II

NEET-2023 Cell-Cycle-and-Cell-Division [class-xi ]

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

Remark: