{"content":{"sharePage":{"page":0,"digests":[{"id":"41468543","dateCreated":"1313630586","smartDate":"Aug 17, 2011","userCreated":{"username":"breannameindl","url":"https:\/\/www.wikispaces.com\/user\/view\/breannameindl","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"},"monitored":false,"locked":false,"links":{"self":"https:\/\/biologyunit2-tsc.wikispaces.com\/share\/view\/41468543"},"dateDigested":1531983363,"startDate":null,"sharedType":"discussion","title":"Question 7","description":"Two different habitats are listed below:
\na)Aquatic: A tropical sea
\nb)Terrestrial: An arid scrubland that is subject to Drought.
\nFor each habitat, identify a combination of two reproductive strategies that could contribute to the successful reproduction of an animal species that lives in that habitat","replyPages":[{"page":0,"digests":[{"id":"41468965","body":"a)Aquatic - There is Broadcast spawning where the parents release their eggs into the water to be fertilised and then carried away by currents. The second way is demersal spawning where the mother will lay them in some sort of nest and then the male will fertilise them.
\n
\nb)Terrestrial - Laying eggs is a strategies because the have their own supply if water and arent at risk of desication. The other way is viviparity where embryos develop in the mothers body.","dateCreated":"1313631189","smartDate":"Aug 17, 2011","userCreated":{"username":"breannameindl","url":"https:\/\/www.wikispaces.com\/user\/view\/breannameindl","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}},{"id":"41653717","body":"the question asks for a combination of strategies
\na) dermersal spawning with parental care
\nb) in and arid envirnonment you might see viviparity with pouch embryo- like you see with marsupials (this way the investment in each young is less than a placental mammal and the the animal is able to suspend the development of the young during harsh conditions of drought).
\nor
\nanother example would be brine shrimp which will lay many small eggs (called cysts) during drought, but live young during flood- a larger investment in each young would be seen when water is available.","dateCreated":"1314255934","smartDate":"Aug 25, 2011","userCreated":{"username":"Angela_Schneider","url":"https:\/\/www.wikispaces.com\/user\/view\/Angela_Schneider","imageUrl":"https:\/\/www.wikispaces.com\/user\/pic\/1311637336\/Angela_Schneider-lg.jpg"}}],"more":0}]},{"id":"41466969","dateCreated":"1313626754","smartDate":"Aug 17, 2011","userCreated":{"username":"TSCNIC0009","url":"https:\/\/www.wikispaces.com\/user\/view\/TSCNIC0009","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"},"monitored":false,"locked":false,"links":{"self":"https:\/\/biologyunit2-tsc.wikispaces.com\/share\/view\/41466969"},"dateDigested":1531983364,"startDate":null,"sharedType":"discussion","title":"Question 2","description":"a) Serial polygyny because male put on elaborate shows and displays to attract multiple female passing by.
\nb) Monogamous because a small number of bling, featherless and helpless chick is typical of a monogamous species.
\nc) Polyandrous because the laying of multiple clutches of eggs in a short period of time suggests that the female would have to have had multiple partners.","replyPages":[{"page":0,"digests":[{"id":"41653727","body":"sounds pretty good
\nI would add
\nb) two parent are required for less developed young- for feeding\/defence etc, because the young is generally more dependent on parents for survival
\nc) female may depend on males for parental care and\/or incubation of each clutch","dateCreated":"1314256103","smartDate":"Aug 25, 2011","userCreated":{"username":"Angela_Schneider","url":"https:\/\/www.wikispaces.com\/user\/view\/Angela_Schneider","imageUrl":"https:\/\/www.wikispaces.com\/user\/pic\/1311637336\/Angela_Schneider-lg.jpg"}}],"more":0}]},{"id":"41421417","dateCreated":"1313470323","smartDate":"Aug 15, 2011","userCreated":{"username":"TSCWAL0029","url":"https:\/\/www.wikispaces.com\/user\/view\/TSCWAL0029","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"},"monitored":false,"locked":false,"links":{"self":"https:\/\/biologyunit2-tsc.wikispaces.com\/share\/view\/41421417"},"dateDigested":1531983364,"startDate":null,"sharedType":"discussion","title":"Question 10","description":"Consider reproduction in marsupial and placental animals.
\n
\na. Identify a major difference between these two types of mammal.
\n
\nb. Should one strategy be regarded as more successful than the other?
\n
\nc. A third mammalian group are the monotremes. How does the reproductive strategy of monotremes differ from the other mammals?
\n
\nd. Construct a table to show similarities or differences between monotreme, marsupial, and placental mammals in terms of the following items:
\ni. fertalisation: internal or external?
\nii. oviparous or vivparous?
\niii. source of nutrition for developing embryo?
\niv. source of nutrition for young?","replyPages":[{"page":0,"digests":[{"id":"41653817","body":"a) major difference is in the main source of nutrients for the developing embryo- in placental mammals it is the placenta (direct from mother blood). In marsupials it is milk after birth.
\n
\nb) both can be and are successful although, there are benefits to marsupials in arid environments (suspend\/abort development by stopping milk production) if conditions are too harsh.
\nfor mammals, they more highly developed offspring may require less care, are more likely to survive or better able to avoid predators.
\n
\nc) oviparous","dateCreated":"1314256745","smartDate":"Aug 25, 2011","userCreated":{"username":"Angela_Schneider","url":"https:\/\/www.wikispaces.com\/user\/view\/Angela_Schneider","imageUrl":"https:\/\/www.wikispaces.com\/user\/pic\/1311637336\/Angela_Schneider-lg.jpg"}}],"more":0}]},{"id":"41399687","dateCreated":"1313384175","smartDate":"Aug 14, 2011","userCreated":{"username":"jess56walker","url":"https:\/\/www.wikispaces.com\/user\/view\/jess56walker","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"},"monitored":false,"locked":false,"links":{"self":"https:\/\/biologyunit2-tsc.wikispaces.com\/share\/view\/41399687"},"dateDigested":1531983364,"startDate":null,"sharedType":"discussion","title":"Question 4- Making connections between concepts","description":"For each of the following reproductive strategies, identify the environmental conditions in which this stragegy could be used to advantage....
\n
\na. Brodcast spawning
\nb. production of amniote eggs
\nc. r-selected numbers of offsprings","replyPages":[{"page":0,"digests":[{"id":"41399765","body":"Question 4 ANSWERS:
\nthe environmental factors are:
\nA>>.that if there is no strong current and no outgoing tide is flowing it wouldn't effect it.
\nB>>. ??
\nC>>. no strong currents and no outgoing tide which is flowing. It wouldn't effect it also because they would be scattered all over the ocean and land.","dateCreated":"1313384607","smartDate":"Aug 14, 2011","userCreated":{"username":"jess56walker","url":"https:\/\/www.wikispaces.com\/user\/view\/jess56walker","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}},{"id":"41653845","body":"a) expect and require string currents or outgoing tides to decrease self fertilisation and predation
\n
\nb) expect to see amniote eggs with most terrestrial egg layers (frogs can be the exception here, but they are half aquatic anyway)
\n
\nc) conditions would be where there is low expected fertilisation and survival-- eg aquatic\/arid","dateCreated":"1314256993","smartDate":"Aug 25, 2011","userCreated":{"username":"Angela_Schneider","url":"https:\/\/www.wikispaces.com\/user\/view\/Angela_Schneider","imageUrl":"https:\/\/www.wikispaces.com\/user\/pic\/1311637336\/Angela_Schneider-lg.jpg"}}],"more":0}]},{"id":"41399083","dateCreated":"1313381456","smartDate":"Aug 14, 2011","userCreated":{"username":"but0066","url":"https:\/\/www.wikispaces.com\/user\/view\/but0066","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"},"monitored":false,"locked":false,"links":{"self":"https:\/\/biologyunit2-tsc.wikispaces.com\/share\/view\/41399083"},"dateDigested":1531983364,"startDate":null,"sharedType":"discussion","title":"Question 7","description":"Two different habitats are listed below:
\n
\nA) Aquatic: a tropical sea
\n
\nB) Terrestrial: an arid scrubland that is subject to drought
\n
\nFor each habitat, identify a combination of two reproductive strategies that could contribute to the sucessful reproduction of an animal species that lives in that habitat.","replyPages":[{"page":0,"digests":[{"id":"41399565","body":"A) R-selection: the 'quick and many' strategy of reproduction is typical of species that reach sexual maturity quickly, produce large numbers of offspring and may put little or no parental care into their offspring. Eg Cuttle fish. lays up to 15,000 eggs.
\n
\nK-selection: the Slower and fewer strategy of reproduction is known as K-selection. Animal species that are k-selected mature slowly, breed later, produce fewer and larger offspring and may put extensive parental care into their offspring. Eg Whales reach sexual maturity at 5 years old, pregnancy in humpback whales is 11.5 months, each female gives birth to only one calf every 1 or 2 years, They feed their young for 10 months after birth.
\n
\nB)Desert tortoises use a reproduction strategy known as r-selection: quick and many. This involves 1-14 eggs being laid in a short amount of time. Unlike the humpback whales the turtle uses oviparity (egg laying) and doesn't stay with it's offspring instead leaves them.If the conditions in the turtles habitat are to harsh the turtle will lay fewer eggs. The turtle also doesn't fully rely on the male for sperm. She can hold sperm internally after intercourse for five years or longer.
\n
\nThe female mallee fowl lays between 12-24 eggs that she lays in intervals of several days. The male mallee fowl makes a nest out of deconposing leaf material and dirt\/sand for the female to lay her eggs in to be buried. they relie on the sun to heat the eggs. the male looks after the incubating eggs for seven weeks, keeping the nest at the right temperature by moving more\/less dirt\/sand onto the nest.","dateCreated":"1313383673","smartDate":"Aug 14, 2011","userCreated":{"username":"but0066","url":"https:\/\/www.wikispaces.com\/user\/view\/but0066","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}}],"more":0}]},{"id":"41394305","dateCreated":"1313367660","smartDate":"Aug 14, 2011","userCreated":{"username":"TSCTUR0009","url":"https:\/\/www.wikispaces.com\/user\/view\/TSCTUR0009","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"},"monitored":false,"locked":false,"links":{"self":"https:\/\/biologyunit2-tsc.wikispaces.com\/share\/view\/41394305"},"dateDigested":1531983364,"startDate":null,"sharedType":"discussion","title":"Question 12","description":"Some flowering plants that live in aquatic habitats are permanently submerged below the water, such as the water thyme (Hydrilla Verticillata)
\n
\nA.Identify one major challenge regarding pollination in these species as compared with pollination in plants living in a terrestrial habitat?
\n
\nB. Identify a possible strategy for pollination in these fully submerged plants. use your imagination,since your are asked to produce a possible, not the correct answer?","replyPages":[{"page":0,"digests":[{"id":"41394351","body":"A. one major challenge would be that a lot of terresstrial pollination occurs through sources such as the wind or animal vectors that carry their pollen from flower to flower. plants submerged in water do not have access to either of these things.
\n
\nB. Water plants can release their pollen into the water and the currents act as a vector such as the wind does for a terrestrial plant. another way is that the plant may have a flower that blooms above the surface to send and collect pollen through factors like the wind and animal vectors.","dateCreated":"1313367760","smartDate":"Aug 14, 2011","userCreated":{"username":"TSCTUR0009","url":"https:\/\/www.wikispaces.com\/user\/view\/TSCTUR0009","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}},{"id":"41653963","body":"very nice answer, I have nothing to add.
\n
\nsomeone might like to give some examples though.......","dateCreated":"1314257577","smartDate":"Aug 25, 2011","userCreated":{"username":"Angela_Schneider","url":"https:\/\/www.wikispaces.com\/user\/view\/Angela_Schneider","imageUrl":"https:\/\/www.wikispaces.com\/user\/pic\/1311637336\/Angela_Schneider-lg.jpg"}}],"more":0}]},{"id":"41393873","dateCreated":"1313366191","smartDate":"Aug 14, 2011","userCreated":{"username":"mag0052","url":"https:\/\/www.wikispaces.com\/user\/view\/mag0052","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"},"monitored":false,"locked":false,"links":{"self":"https:\/\/biologyunit2-tsc.wikispaces.com\/share\/view\/41393873"},"dateDigested":1531983365,"startDate":null,"sharedType":"discussion","title":"Question 7- Making comparisons","description":"Two different habitats are listed below:
\n
\na Aquatic: a tropical sea
\n
\nb Terrestrial: an arid scrubland that is subject to drought
\n
\nFor each habitat, identify a combination of two reproductive strategies that could contribute to the sucessful reproduction of an animal species that lives in that habitat.
\n
\na. A humpback whale miagrates into tropical breeding waters. The humpback uses a reproduction strategie known as the K-selection. This involves a slower-and-fewer approach meaning the development and maturation of the offspring takes time and in this case there is only one offspring (calf). The pregnancy lasts about 11.5 months. The humpback uses the viviparity (giving birth to live young) source of birth and development. To ensure the calf has a good chance of survival the mother stays along side it feeding it the nutrition it needs for up to 10 months after birth.
\n
\nSome reef fish realease sperm and eggs into the water, they then are used to fertilise the eggs of a female reef fish and are taken away by current to avoid nearby predators. This process is known as Broadcast spawning. Another strategy involes a large number of fish in the same location realeasing sperm and eggs into surrounding water. This is called mass spawning.
\n
\nb.
\n Desert tortoises juse a reproduction strategy known as r-selection quick-and-many. This involves 1-14 eggs being laid in a short amount of time. Unlike the humpback the turtle uses oviparity ( egg laying) and doesn't stay with it's offspring but instead leaves them.If the conditions in the turtles habitat are to harsh the turtle will lay fewer eggs. The turtle also doesn't fully rely on the male for sperm. She can hold sperm internally after intercourse for five years or longer.
\nb.","replyPages":[{"page":0,"digests":[{"id":"41393915","body":"A humpback whale miagrates into tropical breeding waters. The humpback uses a reproduction strategie known as the K-selection. This involves a slower-and-fewer approach meaning the development and maturation of the offspring takes time and in this case there is only one offspring (calf). The pregnancy lasts about 11.5 months. The humpback uses the viviparity (giving birth to live young) source of birth and development. To ensure the calf has a good chance of survival the mother stays along side it feeding it the nutrition it needs for up to 10 months after birth.
\n
\nSome reef fish realease sperm and eggs into the water, they then are used to fertilise the eggs of a female reef fish and are taken away by current to avoid nearby predators. This process is known as Broadcast spawning. Another strategy involes a large number of fish in the same location realeasing sperm and eggs into surrounding water. This is called mass spawning.
\n
\nb.
\n Desert tortoises juse a reproduction strategy known as r-selection quick-and-many. This involves 1-14 eggs being laid in a short amount of time. Unlike the humpback the turtle uses oviparity ( egg laying) and doesn't stay with it's offspring but instead leaves them.If the conditions in the turtles habitat are to harsh the turtle will lay fewer eggs. The turtle also doesn't fully rely on the male for sperm. She can hold sperm internally after intercourse for five years or longer","dateCreated":"1313366339","smartDate":"Aug 14, 2011","userCreated":{"username":"mag0052","url":"https:\/\/www.wikispaces.com\/user\/view\/mag0052","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}}],"more":0}]},{"id":"41393393","dateCreated":"1313364288","smartDate":"Aug 14, 2011","userCreated":{"username":"OptimusPrime-ZP","url":"https:\/\/www.wikispaces.com\/user\/view\/OptimusPrime-ZP","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"},"monitored":false,"locked":false,"links":{"self":"https:\/\/biologyunit2-tsc.wikispaces.com\/share\/view\/41393393"},"dateDigested":1531983365,"startDate":null,"sharedType":"discussion","title":"Question 8","description":"Identify one major differnece between the members of the following pairs and suggest a reason in biological terms for this difference.
\n
\nA. a bird-pollinated plant and an insect-pollinated plant
\n
\nB. a wind-pollinated plant and an insect-pollinated plant
\n
\nC. a wind-dispersed fruit and an animal- dispersed fruit
\n
\nD. a dry fruit and a fleshy fruit","replyPages":[{"page":0,"digests":[{"id":"41399175","body":"A. The difference between these two types is that the insects can only see blue or purple or yellow flowers (insects cannot see colours at the red-orange end of the spectrum) where as the bird can see red or orange or yellow.
\n
\nB. The wind pollinated cannot carry pollen to the insects. The insects have to fly to a flower to get there pollen.
\n
\nC.
\n
\nD. Dry fruits that open and shed the seeds that they. In this case, the seeds are the mobile stage that enable dispersal. Fleshy fruits that contains seeds but do not open. The unit of dispersal in this case isn the fruit plus its seeds.","dateCreated":"1313381911","smartDate":"Aug 14, 2011","userCreated":{"username":"OptimusPrime-ZP","url":"https:\/\/www.wikispaces.com\/user\/view\/OptimusPrime-ZP","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}},{"id":"41653871","body":"good-
\nadd:
\nb) some colour differences again, complexity of flower
\nc) size and weight
\nd) fleshy fruits attract animals to eat because of higher water content (water content is main difference) so seeds are dispersed via faeces (poo)","dateCreated":"1314257161","smartDate":"Aug 25, 2011","userCreated":{"username":"Angela_Schneider","url":"https:\/\/www.wikispaces.com\/user\/view\/Angela_Schneider","imageUrl":"https:\/\/www.wikispaces.com\/user\/pic\/1311637336\/Angela_Schneider-lg.jpg"}}],"more":0}]},{"id":"41393391","dateCreated":"1313364266","smartDate":"Aug 14, 2011","userCreated":{"username":"rachaelmccormack","url":"https:\/\/www.wikispaces.com\/user\/view\/rachaelmccormack","imageUrl":"https:\/\/www.wikispaces.com\/user\/pic\/1311223385\/rachaelmccormack-lg.jpg"},"monitored":false,"locked":false,"links":{"self":"https:\/\/biologyunit2-tsc.wikispaces.com\/share\/view\/41393391"},"dateDigested":1531983366,"startDate":null,"sharedType":"discussion","title":"Question 9","description":"In the question it says 'woth' this is meant to say 'with'.","replyPages":[{"page":0,"digests":[],"more":0}]},{"id":"41393223","dateCreated":"1313363777","smartDate":"Aug 14, 2011","userCreated":{"username":"rachaelmccormack","url":"https:\/\/www.wikispaces.com\/user\/view\/rachaelmccormack","imageUrl":"https:\/\/www.wikispaces.com\/user\/pic\/1311223385\/rachaelmccormack-lg.jpg"},"monitored":false,"locked":false,"links":{"self":"https:\/\/biologyunit2-tsc.wikispaces.com\/share\/view\/41393223"},"dateDigested":1531983366,"startDate":null,"sharedType":"discussion","title":"Question 9: Analysing information and communicating ideas","description":"A population of one particular animal (species M) has survived in a particular habitat for many generations. A student concluded that other animal species living in the same habitat would be expected to show the same reproductive strategies as species M. Do you agree woth this student or not? Explain your choice.","replyPages":[{"page":0,"digests":[{"id":"41393617","body":"I don't agree with the student. this is because just because two different species of animal live in the same habitat doesn't mean they have the same reproductive strategies. for example a rabbit breeds very quickly and produces a large amount of kittens (Baby rabbits) where as a kangaroo breeds very slowly and only produces one joey at a time. both these animals live on the same sort of habitats but have different reproductive strategies. this is why i don't agree with the students theory.","dateCreated":"1313365237","smartDate":"Aug 14, 2011","userCreated":{"username":"rachaelmccormack","url":"https:\/\/www.wikispaces.com\/user\/view\/rachaelmccormack","imageUrl":"https:\/\/www.wikispaces.com\/user\/pic\/1311223385\/rachaelmccormack-lg.jpg"}},{"id":"41399073","body":"i do not agree with the students theory because even if two species live in the same are it doesn't mean they have the same reprodutive strategies.","dateCreated":"1313381383","smartDate":"Aug 14, 2011","userCreated":{"username":"TSCFAG0001","url":"https:\/\/www.wikispaces.com\/user\/view\/TSCFAG0001","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}},{"id":"41653935","body":"good- consider overall investment
\n
\nrabbits- invest less per kitten but not all will survive whereas the probability of a kangaroo surviving might be higher--> when comparing the two, we would expect to find a similar overall investment in reproduction (and similar number of surviving offspring each season if we can consider them equally successful).
\n
\n
\nFor this example though, I think we may find rabbits have the upper hand which is why they are such a pest!!!","dateCreated":"1314257486","smartDate":"Aug 25, 2011","userCreated":{"username":"Angela_Schneider","url":"https:\/\/www.wikispaces.com\/user\/view\/Angela_Schneider","imageUrl":"https:\/\/www.wikispaces.com\/user\/pic\/1311637336\/Angela_Schneider-lg.jpg"}}],"more":0}]}],"more":true},"comments":[]},"http":{"code":200,"status":"OK"},"redirectUrl":null,"javascript":null,"notices":{"warning":[],"error":[],"info":[],"success":[]}}