Select the correct sequence for the transport of sperm cells in the male reproductive system:
| 1. | Testis → Epididymis → Vasa efferentia → Vas deferens → Ejaculatory duct → Inguinal canal → Urethra → Urethral meatus |
| 2. | Testis → Epididymis → Vasa efferentia → Rete testis → Inguinal canal → Urethra |
| 3. | Seminiferous tubules → Rete testis → Vasa efferentia → Epididymus → Vas deferens → Ejaculatory duct → Urethra → Urethral meatus |
| 4. | Seminiferous tubules → Vasa efferentia → Epididymis → Inguinal canal → Urethra |
Match the following columns and select the correct option:
| Column-I | Column-II | ||
| (a) | Ovary | (i) | Human chorionic gonadotropin |
| (b) | Placenta | (ii) | Estrogen & Progesterone |
| (c) | Corpus luteum | (iii) | Androgens |
| (d) | Leydig cells | (iv) | Progesterone only |
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iv) | (iii) | (ii) | (i) |
| 2. | (i) | (ii) | (iii) | (iv) |
| 3. | (i) | (iii) | (ii) | (iv) |
| 4. | (ii) | (i) | (iv) | (iii) |
Receptors for sperm binding in mammals are present on:
| 1. | Perivitelline space | 2. | Zona pellucida |
| 3. | Corona Radiata | 4. | Vitelline membrane |
| 1. | blocks estrogen receptors in the uterus, preventing implantation. |
| 2. | increases the concentration of estrogen and prevents ovulation in females. |
| 3. | is an lUD. |
| 4. | is a post-coital contraceptive. |
Venereal diseases can spread through:
| (a) | Using sterile needles |
| (b) | Transfusion of blood from an infected person |
| (c) | Infected mother to foetus |
| (d) | Kissing |
| (e) | Inheritance |
Choose the correct answer from the options given below:
1. (b) and (c) only
2. (a) and (c) only
3. (a), (b) and (c)
4. (b), (c) and (d)
Which of the following is the correct sequence of events in the origin of life?
| I: | Formation of protobionts. |
| II: | Synthesis of organic monomers. |
| III: | Synthesis of organic polymers. |
| IV: | Formation of DNA-based genetic systems. |
| 1. | I, II, III, IV | 2. | I, III, II, IV |
| 3. | II, III, I, IV | 4. | II, III, IV, I |
The chronological order of human evolution from early to the recent is?
| 1. | Australopithecus→Ramapithecus→Homo habilis→Homo erectus |
| 2. | Ramapithecus→Australopithecus→ Homo habilis→Homo erectus |
| 3. | Ramapithecus→Homo habilis→ Australopithecus →Homo erectus |
| 4. | Australopithecus→Homo habilis→Ramapithecus →Homo erectus |
In a species, the weight of a newborn ranges from 2 to 5 kg. 97% of the newborns with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 kg to 5 kg die. Which type of selection process is taking place?
1. Cyclical selection
2. Directional selection
3. Stabilizing selection
4. Disruptive selection
Which of the following refers to correct example(s) of organisms that have evolved due to changes in environment brought about by anthropogenic action?
| (a) | Darwin's Finches of Galapagos islands |
| (b) | Herbicide-resistant weeds |
| (c) | Drug-resistant eukaryotes |
| (d) | Man-created breeds of domesticated animals like dogs |
1. (a) and (c)
2. (b), (c) and (d)
3. only (d)
4. only (a)
1. harvested antibodies
2. gamma globulin
3. attenuated pathogens
4. activated pathogens
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