Class 8 Practice – Level 3 – Set 2 – Reproduction in animals Leave a Comment / By Gulam Hamza / October 25, 2024 Class 8 Practice – Level 3 – Set 2 – Reproduction in animals Total questions: 15 1. How does sexual reproduction promote genetic diversity within a species? By producing genetically identical offspring Through genetic recombination during meiosis By cloning individuals By ensuring all offspring are haploid None 2. Which of the following mechanisms is least likely to occur in terrestrial animals? Internal fertilization Asexual reproduction External fertilization Parthenogenesis None 3. The acrosome of a sperm cell is crucial for: Facilitating penetration of the egg membrane Protecting the genetic material Providing energy to the sperm Storing enzymes for movement None 4. Which of the following reproductive strategies typically results in a higher survival rate of offspring? Oviparity Viviparity Asexual reproduction External fertilization None 5. Which hormone is primarily responsible for thickening the endometrial lining in preparation for a potential pregnancy? Follicle-stimulating hormone (FSH) Estrogen Luteinizing hormone (LH) Progesterone None 6. What is a primary disadvantage of asexual reproduction? It requires more energy. It produces genetically diverse offspring. It can only occur in certain environments. It limits genetic variation. None 7. Which structure in the female reproductive system is primarily responsible for the production of eggs? Uterus Ovary Fallopian tube Vagina None 8. What is one key difference between the fertilization processes in mammals and amphibians? Mammals undergo internal fertilization, while amphibians usually undergo external fertilization. Both mammals and amphibians use external fertilization. Amphibians reproduce only through asexual means. Mammals reproduce through budding. None 9. Which hormone initiates the development of ovarian follicles during the menstrual cycle? Estrogen Luteinizing hormone (LH) Progesterone Follicle-stimulating hormone (FSH) None 10. Genetic disorders can arise in offspring due to: Errors during mitosis only Environmental factors exclusively Errors during meiosis and genetic mutations Only through inheritance from both parents None 11. Which of the following organisms reproduces primarily through fragmentation? Bacteria Starfish Fungi Yeast None 12. During gametogenesis, which process specifically leads to the formation of sperm cells in males? Oogenesis Binary fission Mitosis Spermatogenesis None 13. Which event marks the beginning of the luteal phase in the menstrual cycle? Menstruation Fertilization Ovulation Follicular growth None 14. In females, the total number of eggs produced is generally: Continuous throughout life Limited and finite Infinite, as long as conditions are favorable Dependent on external fertilization None 15. Which of the following strategies would most likely enhance reproductive success in a variable environment? Asexual reproduction Sexual reproduction Cloning Parthenogenesis None 1 out of 15 Time's up
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