part 3 a. Sexually reproducing species must produce male and female sex organs b
ID: 261609 • Letter: P
Question
part 3
a. Sexually reproducing species must produce male and female sex organs b. Sexually re c. Sexually reproducing females must resist mating attempts and sperm entry producing species must find and attract mates fecundity, sexually reproducing females will produce only half the number of female spring of asexually reproducing females. e. Sexually reproduci ng species must find mates, and sexually selected traits reduce survival Part 2. 25 points 1. Na long as its name begins with the same letter me the species you chose on our last quiz. If you missed the quiz, choose any species of wild organism, as as your last name. If you can't think of a species, I will assign you one f you now realize that the name you chose on the last quiz was not really a species (e.g., "tree" or "Pikachu"), you may choose another species to work with and place it here. Do not switch species if your original choice was acceptable 2. Based on what you know about your species, state yes or no, whether you think it is likely to show altruistic behavior. Briefly explain your answer 3. Name a species that has coevolved with your species (or describe such a species if you don't know one very specifically) and briefly describe how each is likely to have influenced evolution in the other Part 3. Answer one (and only one) of the following questions (25 points) 1. If longevity is heritable (as it is often observed to be, across many different kinds of organisms), why aren't populations evolving to have longer and longer life spans? 2. Yellow Warblers are migratory songbirds that live up to ten years (usually four to five years) and breed in York during May and June. A female Yellow Warbler has just arrived from South America and is building h est at Great Kills Park. How many eggs should she lay in her nest? Specifically, what are the variables y vould take into account in trying to answer this question, and what would you want to measure to test your nswer? Male Gibbons (a type of ape in Southeast Asian tropical forests) almost never cheat on their mates. Wh Has asexual reproduction evolved many times, or just a few times? What does your answer imply abo ely effects of asexuality on speciation and extinction rates? rt 4. 30 points nsider the following scenario. A large population of lizards occupies an extensive range that is relat form ecologically (i.e., in terms of climate and co-occurring species). At a certain point in time, th ulation becomes divided down the middle into two similar-sized portions by a barrier that compl movement of lizards between the descendent populations. Around the same time, a major flood Il number of individuals are swept away from the mainland on floating debris and arrive alive o el: hore island that has no lizards of this species. The habitat on the island is similar to their hom tical (the climate is slightly different, many mainland species of plants and animals are absent d s pecies of plants and animals are different from any present on the mainland. Thus, there ar e populations. Compare and contrast the expected evolutionary consequences for these popExplanation / Answer
Answer Part 3:
Subpart 4: Sexual reproduction remains one of the major evolutionary character which has undergone maximum evolution and is still evolving. This can be understood in the terms of lower organisms as well as their gradual development into higher organisms. Lower organisms, such as poriferans, some plant varities and other sub-microscopic organisms often fail to conduct sexual reproduction. In fact, many evolutionary evidences have been found that primitive cells and organisms tended to perform only vegetative reproduction and hence were devoid of any variation and evolution. Since they could not evolve better with the changing environment, many of those species got extinct with time. This allowed the evolutionary force to drive the organisms to perform sexual reproduction to enhance their fitness with respect to the altering environment and hence enhance their chances of survival. Thus, this highly important factor of sexual reproduction has indeed helped organisms to survive better than their counterparts and evolved as a better species.
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