Female mammals undergo continuous reproductive cycles during their reproductive life. In the sense of offspring production, what is the benefit of these continuous cycles
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Female mammals undergo continuous reproductive cycles during their reproductive life. In the sense of offspring production, what is the benefit of these continuous cycles?
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- consider a pig that has only fully formed ovary. how would this affect the pig's future reproduction?Hermaphroditic animals can self-fertilize, except earthworms. Why? And is this an advantageous or disadvantageous trait to the earthworms?in your own words: Compare the reproductive organs of reptiles and birds. How are their reproductive patterns advantageous for their survival?
- Aquatic animals in which fertilisation occurs in water are said to be: (a) viviparous without fertilisation. (b) oviparous with external fertilisation. (c) viviparous with internal fertilisation. (d) oviparous with internal fertilisation.Hermaphroditic animals can self-fertilize, except earthworms. Why? And is this an advantageous or disadvantageous trait to the earthworms? Defend your answer.How do the two kinds of mammalian reproductive cycles—estrous and menstrual—differ from each other?
- Why are offspring of oviparous animals at a greater risk as compared to offspring of viviparous animals?Of all birds, the flightless kiwi has the highest proportion of yolk in its eggs and the longest incubation time. Explain why birds with the longest incubation times have the yolkiest eggs.In species with internal fertilization, the eggs often are attached to the outside of the female's body in brood chambers following copulation, before hatching into free-swimming offspring. What advantages might a brood chamber offer for the development of offspring?
- Why does continued breastfeeding decrease the chance of pregnancy? (Hint: Think about the effect the breastfeeding hormones have on estrogens and progesterone.)?Give account of events that occur following mating and before the onset of cleavage in mammals"Skates and chimeras are oviparous, whereas rays and many sharks are viviparous. Being viviparous means that they _____." Have internal fertilization Have external fertilzation Give birth to live young Lay eggs