Stem cell research is another ethical issue. Stem cells are cells from an early embryo that can become any type of cell, such as heart, lung, liver or skin. The reason people are researching these cells is because you can actually grow new tissues and organs to replace the damaged ones. For example, it may be possible to grow a new set of lungs for someone who is dying of lung cancer. The ethical issue with this type of research is that, to obtain this type of stem cells, it is necessary to destroy an embryo so that it never becomes a person. Do you think this research should be done? Why or why not?
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Biology, 21.06.2019 21:20
Why does the skin of your finger shrink when you wash clothes for a long time?
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Biology, 21.06.2019 23:00
The tasmanian devil, a marsupial carnivore, is facing extinction due to devil facial tumor disease (dftd) which causes bulging cancerous lumps and lesions to erupt around the face and neck — often causing enough deformation to make seeing or eating difficult. dftd has evolved into a contagious cancer, a trait that is unique among cancers. devil mating behavior involves biting around the head and neck, allowing cells from one individual — especially cells from the crumbly dftd tumors — to be transferred to the wounds or face of a new individual. this marsupial was once found across australia, but sea levels rose, isolating the tasmanian population, while the australian population went extinct. what would be an outcome of genetic isolation that is likely to have impacted the spread of dftd? a) reduced territory puts diseased individuals in greater contact with non-diseased ones. b) inbreeding results in less variation in facial features so the cancer is generally fatal. c) genetic isolation has made it difficult for scientists to develop a vaccine against dftd. d) the lack of genetic variation in the immune system of tasmanian devils minimizes resistance to the disease.
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Biology, 21.06.2019 23:10
Depending on the organism the number of in a cell may change
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Biology, 22.06.2019 02:30
Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .
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Stem cell research is another ethical issue. Stem cells are cells from an early embryo that can beco...
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