Select the correct events that occur during inspiration.
(a) Contraction of diaphragm
(b) Contraction of external inter-costal muscles
(c) Pulmonary volume decreases
(d) Intra pulmonary pressure increases
1. (c) and (d)
2. (a), (b) and (d)
3. only (d)
4. (a) and (b)
Subtopic: Respiratory System: Pulmonary Ventilation |
68%
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NEET - 2020
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The roots that originate from the base of the stem are:
1. Primary roots
2. Prop roots
3. Lateral roots
4. Fibrous roots
Subtopic: Morphology of Roots |
67%
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NEET - 2020
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Subtopic: Flower & Parts of Flower |
85%
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NEET - 2020
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Match the following columns and select the correct option.
| Column I | Column-II | ||
| (a) | Floating Ribs | (i) | Located between second and seventh ribs |
| (b) | Acromion | (ii) | Head of the Humerus |
| (c) | Scapula | (iii) | Clavicle |
| (d) | Glenoid cavity | (iv) | Do not connect with the sternum |
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (iii) | (ii) | (iv) |
| 2. | (iii) | (ii) | (iv) | (i) |
| 3. | (iv) | (iii) | (i) | (ii) |
| 4. | (iv) | (ii) | (i) | (iii) |
Subtopic: Sternum & Ribs | Appendicular Skeleton: Upper Limb |
82%
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NEET - 2020
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If the head of the cockroach is removed, it may live for a few days because:
| 1. | The cockroach does not have a nervous system |
| 2. | The head holds a small proportion of the nervous system while the rest is situated along the ventral part of its body |
| 3. | The head holds 1/3rd of the nervous system while the rest is situated along the dorsal part of its body |
| 4. | The supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen |
Subtopic: Cockroach: Nervous System |
68%
From NCERT
NEET - 2020
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Identify the incorrect statement.
| 1. | Sapwood is involved in conduction of water and minerals from roots to leaves. |
| 2. | Sapwood is the innermost secondary xylem and is lighter in colour |
| 3. | Due to deposition of tannins, resins, oils etc., heartwood is dark in colour. |
| 4. | Heart wood does not conduct water but gives mechanical support. |
Subtopic: Types of Wood (OLD NCERT) |
79%
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NEET - 2020
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Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (BT) is resistant to:
2. Plant nematodes
3. Insect predators
4. Insect pests
Subtopic: Bt Crops |
71%
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NEET - 2020
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The number of substrate level of phosphorylations in one turn of citric acid cycle is:
| 1. | One | 2. | Two |
| 3. | Three | 4. | Four |
Subtopic: Kreb's Cycle |
71%
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NEET - 2020
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Identify the wrong statement with regards to restriction enzyme:
| 1. | They cut the strength at palindromic sites. |
| 2. | They are useful in genetic engineering. |
| 3. | Sticky ends can be joined by using DNA ligases. |
| 4. | Each restriction enzyme functions by inspecting the length of a DNA sequence. |
Subtopic: Restriction Enzymes - Main Enzymes |
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NEET - 2020
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Flippers of Penguins and Dolphins are examples of:
| 1. | Convergent evolution | 2. | Industrial melanism |
| 3. | Natural selection | 4. | Adaptive radiation |
Subtopic: Concept of Organic Evolution: Evidence: 2 |
87%
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NEET - 2020
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