In animal kingdom, along with XX-YY mechanism, many other variants of chromosomal sex determination mechanisms have been described such as XX-XO mechanism, ZZ-ZW mechanism ZZ-ZO mechanism and haplo-diploidy mechanism, which are present respectively in:
| 1. | Birds, Grasshopper, Wasp, Moth |
| 2. | Grasshopper, Birds, Moth, Wasp |
| 3. | Birds, Moth, Grasshopper, Wasp |
| 4. | Grasshopper, Moth, Birds, Wasp |
Subtopic: Sex Determination |
80%
Level 1: 80%+
NEET - 2024
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Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the correct answer from the options given below:
| Assertion (A): | Juxta Glomerular Apparatus (JGA) plays an important role in regulation of glomerular filtration rate (GFR). |
| Reason (R): | A fall in GFR can activate the J.G. cells to release renin which can stimulate the glomerular blood flow and thereby bringing the GFR to normal level. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Formation of Urine |
89%
Level 1: 80%+
NEET - 2024
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Match List-I with List-II:
Choose the correct answer from the options given below:
| List-I (Events) | List-II(Prophase-I) | ||
| A. | Chromosomes start pairing together to form synaptonemal complex | I. | Pachytene |
| B. | Chromosomes visible under light microscope and compaction continues | II. | Zygotene |
| C. | Four chromatids of bivalent chromosomes become distinct and recombinant nodules appear | III. | Diplotene |
| D. | Dissolution of synaptonemal complex | IV. | Leptotene |
| 1. | A-II, B-I, C-IV, D-III | 2. | A-I, B-IV, C-III, D-III |
| 3. | A-III, B-II, C-IV, D-I | 4. | A-II, B-IV, C-I, D-III |
Subtopic: Cell Cycle: Meiosis I |
79%
Level 2: 60%+
NEET - 2024
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