UNDERSTANDING SEX: VIDEO

1. What form of asexual reproduction occurs in the whip-tail lizard?






2. Which sex is believed to be the "ancestral" sex?






3. Why do the whip-tail lizards interact in such a way that one takes a male role and the other takes a female role?






4. Which organisms are often studied to help understand the origin of sex?






5. List the names of the 3 major ideas/theories for how sex started.






6. Choose the type of plant with the most complicated life cycle: green algae, seed plants, flowering plants, or ferns.






7. Why is plant sex necessary for the plants?






8. List any 3 "go-betweens" (pollinators) that plants rely on.






9. What is the secret to sexual success?






10. List any 3 features of plants used to attract pollinators.






11. List the 3 main features of the egg cell.






12. List the 3 main features of the sperm cell.






13. How many pairs of chromosomes do humans have?






14. An individual with two X chromosomes (XX) becomes a __________.






15. An individual with one X and one Y chromosome (XY) becomes a _______.






16. What else, other than sex chromosomes, determines the sex of a leopard gheko?






17. What is the "cascade" referred to in the video which shapes sex in the individual?






18. Why did nature invent the "pair bond"?






19. What is the effect of OXYTOCIN on female prairie voles?






20. What is the effect of VASOPRESSIN on male prairie voles?






21. Do humans produce these hormones?






22. Is monogamy common in mammals?






23. When, during their 28-day cycle, do female rhesus monkeys engage in sex?






24. List 2 costs of sex.






25. List 2 reasons why the male of a species is important to the female.