Myelin sheath is produced by:
1. Astrocytes and Schwann cells
2. Oligodendrocytes and Osteoclasts
3. Osteoclasts and Astrocytes
4. Schwann cells and Oligodendrocytes
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAttractants and rewards are required for:
1. Entomophily
2. Hydrophily
3. Cleistogamy
4. Anemophily
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyReceptor sites for neurotransmitters are present on:
1. Pre-synaptic membrane
2. Tips of axons
3. Post-synaptic membrane
4. Membrane of synaptic vesicles
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCoconut fruit is a:
1. Berry
2. Nut
3. Capsule
4. Drupe
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAdult human RBCs are enucleated. Which of the following statement(s) is/ are the most appropriate explanation for this feature?
| a. | They do not need to reproduce |
| b. | They are somatic cells |
| c. | They do not metabolize |
| d. | All their internal space is available for oxygen transport |
1. Only (a)
2. (a),(c) and (d)
3. (b) and (c)
4. Only (d)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCapacitation occurs in:
1. Epididymis
2. Vas deference
3. Female reproductive tract
4. Rete testis
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAsymptote in a logistic growth curve is obtained when:
1. K=N
2. K>N
3. K<N
4. The value of 'r' approaches zero
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyArtificial selection to obtain cows yielding higher milk output represents:
| 1. | Directional, as it pushes the mean of the character in one direction |
| 2. | Disruptive, as it splits the population into two, one yielding higher output and the other lower output |
| 3. | Stabilizing followed by disruptive, as it stabilizes the population to produce higher-yielding cows |
| 4. | Stabilizing selection, as it stabilizes this character in the population |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect the mismatch:
| Column I | Column II | |
| 1. | Rhodospirillum | Mycorrhiza |
| 2. | Anabaena | Nitrogen fixer |
| 3. | Rhizobium | Alfalfa |
| 4. | Frankia | Alnus |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGood vision depends on adequate intake of carotene rich food.
Select the best option from the following statements:
| i. | Vitamin A derivatives are formed from carotene |
| ii. | The photopigments are embedded in the membrane discs of the inner segment |
| iii. | Retinal is a derivative of Vitamin A |
| iv. | Retinal is a light-absorbing part of all the visual photopigments |
1. (i),(iii) and (iv)
2. (i) and (iii)
3. (ii), (iii) and (iv)
4. (i) and (iv)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology
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