Identify the correct statements regarding Mass flow hypothesis.
A:
Mass flow is faster than diffusion.
B:
Mass flow is the result of pressure difference between the end points.
C:
Different substances involved in mass flow move at different paces.
D:
Mass flow can result through either a positive or a negative hydrostatic pressure gradient.
Choose the correct answer from the options given below:
1.
(A), (C), (D) only
2.
(B), (C), (D) only
3.
(A), (B), (C) only
4.
(A), (B), (D) only
Subtopic: The Pressure Flow or Mass Flow Hypothesis |
From NCERT
NEET - 2023
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Doubling of the number of chromosomes can be achieved by disrupting mitotic cell division soon after:
| 1. | Anaphase | 2. | Telophase |
| 3. | Prophase | 4. | Metaphase |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
NEET - 2023
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Given below are two statements :
In the light of the above statements, choose the most appropriate answer from the options given below:
1. Statement I is correct but Statement II is incorrect
2. Statement I is incorrect but Statement II is correct
3. Both Statement I and Statement II are correct
4. Both Statement I and Statement II are incorrect
| Statement I: | RuBisCO is the most abundant enzyme in the world. |
| Statement II: | Photorespiration does not occur in C4 plants. |
1. Statement I is correct but Statement II is incorrect
2. Statement I is incorrect but Statement II is correct
3. Both Statement I and Statement II are correct
4. Both Statement I and Statement II are incorrect
Subtopic: Photorespiration |
82%
From NCERT
NEET - 2023
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In 'rivet popper hypothesis', Paul Ehrlich compared the rivets in an airplane to
| 1. | species within a genus | 2. | genetic diversity |
| 3. | ecosystem | 4. | genera within a family |
Subtopic: Importance of Biodiversity |
65%
From NCERT
NEET - 2023
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In a pea flower, five petals are arranged in a specialized manner with one posterior, two lateral and two anterior. These are named as___________, ____________ and ________ respectively.
1. Keel, Wings and standard
2. Vexillum, Keel and standard
3. Keel, Standard and Carina
4. Standard, Wings and Keel
1. Keel, Wings and standard
2. Vexillum, Keel and standard
3. Keel, Standard and Carina
4. Standard, Wings and Keel
Subtopic: Flower & Parts of Flower |
71%
From NCERT
NEET - 2023
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In which of the following sets of families, the pollen grain are viable for months?
1. Solanaceae, Poaceae and Liliaceae
2. Brassicaceae, Liliaceae and Poaceae
3. Rosaceae, Liliaceae and Poaceae
4. Leguminosae, Solanaceae and Rosaceae
1. Solanaceae, Poaceae and Liliaceae
2. Brassicaceae, Liliaceae and Poaceae
3. Rosaceae, Liliaceae and Poaceae
4. Leguminosae, Solanaceae and Rosaceae
Subtopic: Stamen: Microsporangium | Stamen: Male Gametophyte |
83%
From NCERT
NEET - 2023
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Transfer of pollen grains from anther to stigma of another flower of same plant is known as:
| 1. | Geitonogamy | 2. | Xenogamy |
| 3. | Autogamy | 4. | Cleistogamy |
Subtopic: Pollination & Outbreeding Devices |
86%
From NCERT
NEET - 2023
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The phenomenon which is influenced by auxin and also played a major role in its discovery is:
1. Phototropism
2. Root initiation
3. Gravitropism
4. Apical Dominance
1. Phototropism
2. Root initiation
3. Gravitropism
4. Apical Dominance
Subtopic: Growth Hormones & Auxin | Photoperiodism (OLD NCERT) |
61%
From NCERT
NEET - 2023
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The transverse section of plant part showed polyarch, radial and exarch xylem, with endodermis and pericycle. The plant part is identified as:
| 1. | Monocot root | 2. | Dicot root |
| 3. | Dicot stem | 4. | Monocot stem |
Subtopic: Anatomy of Root |
71%
From NCERT
NEET - 2023
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What will happen if fresh water lake gets contaminated by the addition of polluted water with high BOD?
| 1. | Amount of dissolved oxygen in the lake will decrease. |
| 2. | The lake will remain unaffected |
| 3. | Number of submerged aquatic plants in the lake will increase |
| 4. | Number of aquatic animals in the lake will increase. |
Subtopic: Water Pollution |
83%
From NCERT
NEET - 2023
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