Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?

NEET-2021 Organisms-and-Populations [class-xii ]

• Resource partitioning
• Competitive release
• Mutualism
• Predation
Correct Option: A  [ Resource partitioning ]

Remark:

Amensalism can be represented as:

NEET-2021 Organisms-and-Populations [class-xii ]

• Species A (–); Species B (0)
• Species A (+); Species B (+)
• Species A (–); Species B (–)
• Species A (+); Species B (0)
Correct Option: A  [ Species A (–); Species B (0) ]

Remark:

The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as:

NEET-2021 Ecosystem [class-xii ]

• Climax
• Climax community
• Standing state
• Standing crop
Correct Option: C  [ Standing state ]

Remark:

Which of the following statements is not correct?

NEET-2021 Ecosystem [class-xii ]

• Pyramid of biomass in sea is generally inverted.
• Pyramid of biomass in sea is generally upright.
• Pyramid of energy is always upright.
• Pyramid of numbers in a grassland ecosystem is upright.
Correct Option: B  [ Pyramid of biomass in sea is generally upright. ]

Remark:

In the equation GPP–R = NPP.
R represents:

NEET-2021 Ecosystem [class-xii ]

• Radiant energy
• Retardation factor
• Environment factor
• Respiration losses
Correct Option: D  [ Respiration losses ]

Remark:

Which of the following statements is correct?

NEET-2021 Biological-Classification [class-xi ]

• Fusion of two cells is called Karyogamy.
• Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy.
• Organisms that depend on living plants are called saprophytes.
• Some of the organisms can fix atmospheric nitrogen in specialized cells called sheath cells.
Correct Option: B  [ Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy. ]

Remark:

Match Column-I with Column-II.
Choose the correct answer from the options given below:

NEET-2021 Morphology-of-Flowering-Plants [class-xi ]

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

Remark:

Select the correct pair.

NEET-2021 Anatomy-of-Flowering-Plants [class-xi ]

• Large colorless empty cells in the epidermis of grass leaves

  - Subsidiary cells

• In dicot leaves, vascular bundles are surrounded by large thick-walled cells

  - Conjunctive tissue

• Cells of medullary rays that form part of cambial ring

  - Interfascicular cambium

• Loose parenchyma cells rupturing the epidermis and forming a lensshaped opening in bark

  - Spongy parenchyma

Correct Option: C  [
Cells of medullary rays that form part of cambial ring

Interfascicular cambium
]

Remark:

Match List-I with List-II.

NEET-2021 Biomolecules [class-xi ]

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

Remark:

Match List-I with List-II.

NEET-2021 Cell-Cycle-and-Cell-Division [class-xi ]

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

Remark: